serious-discussion

[cold rivet]

or like ranges, actually

2-4, 4-8

yknow the powers of 2

multiply or divide a positive real number enough (by 3) itll end up in this range 3-9

and another range 9-27

powers of 3

why is there no jesse “science bitch” emoji

[wet berry]

Positive real numbers or natural numbers?

Cuz if this is for positive reals then the range is just the entirety of the positive reals

[cold rivet]

real numbers

positive

[cold rivet]

whats this mean?

[wet berry]

Wait no I don’t understand what you’re trying to say

[cold rivet]

ok so give me a positive real

[wet berry]

Square root of 2

[cold rivet]

ok

thats a funni one but so

if i multiply or divide that by 3, it will be in these “ranges” 3-9, 9-27, etc

so sqrt2 * 3 = 4.2

probably

[wet berry]

By 3-9 do you mean like all the numbers between 3 and 9

[cold rivet]

4.2*3= somewhere between 9-27

[cold rivet]

it is between 3 and 9

or equal to one of them

[wet berry]

Ok so you’re saying that any number in (3,9) multiplied by 3 lies in (9,27)?

[cold rivet]

4.2 x 3^2 = between 27-81

[cold rivet]

you made it sound dumb

but

yea

[solid snow]

this is f([a,b]) where f(x) = a^x

[cold rivet]

are these sets with []

[solid snow]

closed interval

[cold rivet]

ok

ive just been assuming

[cold rivet]

but thats not quite right

tf([a,a^2]) where f(x) = a^x

and well

f([a,a^2]) where f(x) = ax

but like it might be really far off from x or something

that function was wonky but you get the point, right?

[solid snow]

no

[cold rivet]

read above

[cold rivet]

like start here

[solid snow]

i still don't know what you're trying to say

[cold rivet]

other guy can you explain?

[wet berry]

Who

[cold rivet]

you?

[cold rivet]

idk so dude give me a positive real

[wet berry]

I think I know but it’s not really a revolutionary thought

[cold rivet]

newtons first law

things will move until they are stopped

[faint garden]

37

[cold rivet]

thermodynamics first law

[cold rivet]

so lets use 2

[wet berry]

What he’s saying is if x is in (a,b) with b greater than a then cx is in (ca,cb)

[cold rivet]

currently it is between 32-64

divide it by 2 its gonna be between 16-32

multiply it and its between 64-128

essentially

thats the basic concept but this may actually help me with a programming thing im doing but thats completely unrelated

[cold rivet]

but this is true it isnt revolutionary at all

if someone doesnt understand do ask me

[faint garden]

Oh, so if I say 1<x<10 then I can multiply everything by c to get 1c<cx<10c

[wet berry]

Yeah

[cold rivet]

yea pretty much

i was using exponents to get a “simpler” answer but there really isnt a differencd

[ocean harbor]

Hi cat

I mean chat

[solid marten]

Why cats channel but no dogs channel

??

probably racism

[ocean harbor]

💀

all math lovers like cats idk

[cold rivet]

omg its a kira

[ocean harbor]

Hai

[cold rivet]

what kind of kira is it?

[ocean harbor]

idk

[cold rivet]

is it kira yoshikage

kira deathnote

[flat harbor]

hihelohi

[ocean harbor]

there's many people named akira

[ocean harbor]

Hello

:D

[cold rivet]

no

you are a singular kira

[mental stratus]

Plots.jl

[cold rivet]

a kira

[ocean harbor]

no?

[ocean harbor]

[flat harbor]

know when to drop a bit mate

noones tagging along

[ocean harbor]

[flat harbor]

party night wooooo

[ocean harbor]

it's night for you rn?

[flat harbor]

its 12:28pm im in bed rolling around

[mental stratus]

for me

[ocean harbor]

oh nice

i wanna do same

[mental stratus]

roll around in bed with blo?

[ocean harbor]

no

around my bed

[flat harbor]

pika has a problem im sorry

[mental stratus]

[ocean harbor]

💀

[flat harbor]

u shuld do it rn if u dont have any

life obstacles

[ocean harbor]

tbh I wanna play geometry dash

fun

[flat harbor]

rare game for the 2020s

still a banger

[ocean harbor]

@daring sphinx

[daring sphinx]

hi

[ocean harbor]

Hi

[cold rivet]

not really

[neat lintel]

I have no idea. noticeable? You'll probably never notice it untill you're too far gone

[alpine comet]

not a lot

lacking even a small amount of iode leads to huge differences, esp when the brain is still developing

I mean, the brain uses a signficant amount of energy, outrageously much by weight proportion

But irreversible is a higher bar. That Idk

[latent edge]

That's not just good but pretty much awesome

[mint patio]

#advanced-analysis message

When does functional analysis become this LOL

This is so different from everything else I’ve seen man it looks so much more fun

[latent edge]

bro is talking about fredholm IE

[mint patio]

Is that a book?

[latent edge]

fredholm integral eq

similar to DEs

but integrals

wait is it IE

let me check again

[mint patio]

I don’t think so lol the original question isn’t at all

The context is right above

[latent edge]

lol nvm lmao

I just skimmed and saw something very similar

So I assumed it was IE

adv analysis is the spiciest channel imo

[mint patio]

It’s definitely something LOL

[serene pulsar]

Finished level 6 review today, now I just have to practice. I'll be timing myself to see how long each question takes me, seeing which ones I get wrong, and where I need improvement. I have all day tomorrow and until about 14:30 the next day until I have to leave for the placement exam.

I've worked so hard, that I should simply be proud of how far I've come and how persistent I've been. So no matter what happens, it'll be a success.

[flat harbor]

[neat lintel]

@latent edge did u do diff geo? If so what book you chose?

[latent edge]

yes I did

I don't quite remember what book but it was dedicated for physics people

It was more intuitive

Then I took another book but that one was more rigorous

[neat lintel]

Can you name some of your favorite books? Please

[mint patio]

obligatory PMA

[rocky shuttle]

obligatory MFoE

[river moon]

obligatory BFGS

[burnt ledge]

onligatory BJoK

[flat harbor]

obligatory MT:DBD

[flat harbor]

i wish i owned a dishwasher

[fair hatch]

it aint that great

you gotta wash them first lol

[past bear]

a dishwasher ?

[flat harbor]

thats what i also fear

[burnt ledge]

I feel like id be too conservative w using it so it would become a bit of a burden

Bc thats how we use it at home

so i learnt that

[flat harbor]

i also kinda like being a dishwasher

[burnt ledge]

Its so fun washing dishes

[flat harbor]

very therapeutic

[fair hatch]

its 5am and im doing math!

[flat harbor]

u just put on a video and smooth sail

[past bear]

set theory is more fun

[flat harbor]

kinda like folding laundry

[burnt ledge]

Yess

[flat harbor]

uve said that like 5 times in chat we get it u like math wow

[burnt ledge]

and vacuuming and so on

Chores are just fun

[flat harbor]

vacuuming is amazing

after having spent

[neat lintel]

............. Can I make a sexist joke ?

[past bear]

ok

[flat harbor]

many years without the power of vacuum

[burnt ledge]

Since you asked so nicely . Go ahead (but beware)

[past bear]

i dont think i have a vacuum

[flat harbor]

chat it might be just me but i think this channel is also kinda not great

the energies here aint live

[burnt ledge]

Its because of all the redacted

[neat lintel]

Everybody is internally dead

[flat harbor]

why they all gotta be fools

[neat lintel]

Isn't that what about being a mathematician is about ?
Being internally dead

[burnt ledge]

why they cant be einsteins 😞

[wet mortar]

we're waiting nidhi

[neat lintel]

What ?

[flat harbor]

being an einstein is the best

[neat lintel]

Wittgenstein was much better imo

[flat harbor]

of course true einsteins dont reveal their status..

[burnt ledge]

E=mc² to you 😄

[mental stratus]

+ai

[flat harbor]

brownian motion to u too haha

[past bear]

not smart enough

[neat lintel]

Isn't there p too in the whole formula ?

[burnt ledge]

Im still waiting yk nidhi

[neat lintel]

Waiting for what ?

[flat harbor]

ure rly stacking up the ban reasons

[past bear]

E = mc^2 is the incomplete equation

[flat harbor]

misogyny, physicsposting

being unfunny

racism (pending)

the time of reckoning approaches

[neat lintel]

Yeah, it's E²=m²c⁴+p²c²

[past bear]

yes

[burnt ledge]

You havent done the sexist joke you asked for

[flat harbor]

fools they are

[mental stratus]

[neat lintel]

You took that seriously ?

[mental stratus]

don't

[burnt ledge]

No i took it as a joke but you didnt actually make the joke

[flat harbor]

and now we clearly know that u didnt take it as a joke either

but was actually misogynistic

we got em chat

round of applause

[neat lintel]

Well I wasn't going to anyway, the joke was about asking to make the joke

[burnt ledge]

Another Einstein victory over the fools

only 99 to go

[neat lintel]

What ?

[flat harbor]

einsteins been winning since 0AD

[neat lintel]

That's sooo weird ;-;

[flat harbor]

cant stop cant be stopped

[mental stratus]

why do we go from bc to ad from back to front like that

[past bear]

man i'd be motivated to do math then i get stuck on a random exercise for an hour

[neat lintel]

Sameeee, get really excited in concept, learn it and do some problems, get a really hard problem and give up midway!!!!!

[flat harbor]

idk probably colonialism

[burnt ledge]

It kinda makes sense but also idk

[past bear]

fr now i no longer want to do math

[neat lintel]

Tis okay, u will get back to it soon

[flat harbor]

why doesnt everyone just use the date tags u can format on discord msgs

[past bear]

i found a way to do the exercise

finallt

[fair hatch]

goodnight yall. my brain hurts

[neat lintel]

Take care tuxly

[burnt ledge]

i forgot how to use those

[flat harbor]

i have to remind myself by googling "discord timestamp" every single time

[burnt ledge]

Hahahahaha

[past bear]

now i am stuck on another exercise

[livid wing]

Where do I toggle sending messages with enter?

[pearl cave]

damn… over 5k pings from this server

[prisma plinth]

hm

[tepid light]

Ping machine

[thorn grove]

Anyone have any experience with optimization? I'm thinking about picking it up this coming fall semester, but I'm unsure how difficult such a class would be.

[prisma plinth]

calculus stationary points go brrr

[tribal fable]

personally i didnt like it but its not too difficult i dont think

[icy shadow]

don't worry it gets worse

after a certain point it's not 1 hour anymore it's 3 then 1 day and so on

[past bear]

well i ended up doing the exercise

30 minutes later

[silver gale]

Hello

[cold rivet]

what is p =np

like the basic concept

also what is n + 1

both are computer science

[neat lintel]

p = 0 or n = 1

[thorn grove]

Wdym?

[neat lintel]

P & NP are complexities / time required to complete a problem

P is the easier of the two

P means polynomial time

N means Nondeteministic

If P = NP that means every problem is~~ the real~~ deterministic and can be solved with a deterministic algorithm

which also means that all problems can be solved in $$O(n^2)$$

[fathom swallow]

brandon_hu

[storm sage]

Wait what

Why does it imply that

[neat lintel]

idk

I'm just repeating what I heard

[storm sage]

I can't find a source for that claim

I agree with the rest of what you said tho

[neat lintel]

https://cs.stackexchange.com/questions/99621/if-p-np-can-all-np-problems-be-solved-within-time-onk-for-fixed-k

maybe i'm wrong idk

[storm sage]

Wait, doesn't that link disagree with what you just said

[cold rivet]

can something be np and not p?

[neat lintel]

Yes

[cold rivet]

ok what is np conplete?

[prisma plinth]

wtf

[cold rivet]

its simple but its always explained so badly

im getting there

[storm sage]

We don't know

That's why P = NP isn't solved

If P = NP, then the answer is no, any NP problem is also in P

If P ≠ NP, then the answer is yes, there are NP problems which are not in P

[cold rivet]

so i wrote that question wrong

[storm sage]

Most computer scientists think yes, there are probably NP problems which are not in P

But it's really difficult to prove

[cold rivet]

p = np is whether or not np can be not p

wait

[storm sage]

Yeah whether or not a problem in NP must also be in P or not

[cold rivet]

P is quickly solved

NP = checking an answer quickly

[storm sage]

Yup exactly

[cold rivet]

tf is Pspace

[gaunt quest]

the set of problems (you can give yes or no answers to) that are solvable in polynomial space*

[cold rivet]

uh oh i went too far

[gaunt quest]

so P would be polynomial time I believe and PSPACE is polynomial space

[cold rivet]

let me step back here

why is it P? (like why is it polynomial?)

[gaunt quest]

there's two ways algorithms can grow in complexity, they can either take more time to compute or more space to compute

if the growth in the time it takes to compute is polynomial, it's P

if the growth in the space it takes to compute is polynomial, it's PSPACE

memory space to be clear

[faint garden]

If p=np then n=1

[cold rivet]

ok so

why is this a 2d plane then?

or am i overthinking that part?

[gaunt quest]

a 2d plane?

[cold rivet]

well 2 axises, right?

[gaunt quest]

I wouldn't think of them as axes

something can be in P or in PSPACE

or both

[cold rivet]

can something be in p and not pspace???

[gaunt quest]

actually P is strictly contained in PSPACE so if something is in P it's in PSPACE too

[cold rivet]

lemme just post this again for clarity

oh shit i cant

stupid mods

[cold rivet]

because if it takes no memory its fast?

what if its like a really long loop that takes very little space in comparison?

like calculating an irrational number

[gaunt quest]

there are smaller space complexity classes than PSPACE, but if you're in one you're also in PSPACE

like NL

[cold rivet]

ok

[cold rivet]

whats NL?

[neat lintel]

Nether reaLm

[gaunt quest]

nondeterministic logarithmic space complexity

[neat lintel]

i was a bit off

Northernlion

[storm sage]

Wait what what do the mods have to do with this lol

[cold rivet]

some people can upload photos and other cant

[neat lintel]

u nationalistic mods suck

[gaunt quest]

yeah it was actually northernlion

[cold rivet]

its cus im black isnt it

[neat lintel]

bruh

[cold rivet]

@mods if u r racist you can just tell me

[neat lintel]

how did it escalate

[neat lintel]

https://tenor.com/view/discord-image-perms-flex-image-flexx-gif-20201451

Yes,
I think 𝗒𝗈𝗎 fucked it up

[cold rivet]

i did just fuck it up

[storm sage]

What

[cold rivet]

[storm sage]

Please don't stir stuff like that here

[cold rivet]

so i think i understand

maybe

[neat lintel]

@storm sage did you see their deleted message?

[cold rivet]

well what other reason cant i post stuff?

[storm sage]

You can post images if you open a help channel

No, let me look

Okay wtf, just stop trolling

[storm sage]

#changelog message

[cold rivet]

im not a new user

i joined last year

!rank

[storm sage]

It's based on activity, not join date

[cold rivet]

ok

racial bias

[storm sage]

And specifically helpful activity

Okay I told you to stop trolling

[storm sage]

This was the picture they wanted to repost, for reference

[gaunt quest]

yeah makes sense

maybe that's a misleading picture though since we don't know the relative sizes of these classes

[storm sage]

haha yeah or if P = NP

but it's pretty decent

[neat lintel]

r u a math major

[gaunt quest]

yeah I can't think of a better one so ig I can't say much :P

[modest spade]

how do you get active role is there like a level you have to reach

[neat lintel]

u probably have to reach a level

[storm sage]

Yeah

[storm sage]

hahahaha

[storm sage]

It's not based on the level that the bot gives you

Generally speaking it counts your recent activity, and helpful messages are weighted more than general discussion

[modest spade]

ah okay

i think i've talked in this disc every day for the past like month lol im gonna make it my goal to get it

[storm sage]

hahahaha

[gaunt quest]

I believe in you 💪

[mental stratus]

i got active when i spammed in C£££££££ th####

[long matrix]

hahaha skill issue

wait muted

[ocean harbor]

[storm sage]

yeah don't insult the person if they can't answer back smh smh

[neat lintel]

MFW I learned skill issue is an insult

[flat harbor]

its so funny though

if u get muted then its ur duty to be pinged in chat without the ability to respond

[ocean harbor]

[sleek pagoda]

are coding problems allowed in help?

[ocean harbor]

I think so

but what kind of language

latex?

[sleek pagoda]

No java

But it's project euler

[jagged forge]

latex… my favorite programming language

actually Google says latex is Turing complete lmao

[sleek pagoda]

Beats a calculator lol

Actually is a calculator turing complete?

[jagged forge]

depends on what kind of calculator

if it’s ur standard 4 function calculator then obvious not

but i learned to program on my ti-84 in ti-basic. pretty sure those turing complete

how involved is this coding problem and is it homework?

[ocean harbor]

oh my god I thought latex was a language lmao

[ocean harbor]

thats cringe and hard

cuz

you take about 1.5 hour to find the error

[ocean harbor]

have you tried julia

[jagged forge]

ive heard good things about julia

dynamically typed like Python but fast. but i heard the startup time sucks

[ocean harbor]

yeah

at least it's better than java ngl

[sleek pagoda]

No

What do you mean by involved

[jagged forge]

if it ain’t homework and you just need a little help I think asking in this channel is fine

[sleek pagoda]

Ok

I'll send the problem

[sleek pagoda]

But I think I need a lot

A perfect number is a number for which the sum of its proper divisors is exactly equal to the number. For example, the sum of the proper divisors of would be , which means that is a perfect number.

A number is called deficient if the sum of its proper divisors is less than and it is called abundant if this sum exceeds .

As is the smallest abundant number, , the smallest number that can be written as the sum of two abundant numbers is . By mathematical analysis, it can be shown that all integers greater than can be written as the sum of two abundant numbers. However, this upper limit cannot be reduced any further by analysis even though it is known that the greatest number that cannot be expressed as the sum of two abundant numbers is less than this limit.

Find the sum of all the positive integers which cannot be written as the sum of two abundant numbers.

[jagged forge]

oh it’s project euler

[sleek pagoda]

I'll send the code

[ocean harbor]

how did you type all in one sec

this

[jagged forge]

copypaste

[sleek pagoda]

'''public static void main(String[] args){
ArrayList<Integer> myNumbers = new ArrayList<Integer>();
HashSet<Integer> abundantNumbers = new HashSet<Integer>();
int a = 395465626;
for(int i=0;i<28124;i++){
for(int j=0;j<28124;j++){
if(IsAbundent(i) && !abundantNumbers.contains((i+j)) && i+j<28124){
if(IsAbundent(j)){
abundantNumbers.add(i+j);
a = a - (i+j);
System.out.println(a);
System.out.println(i+j);
}
}
}

    }
}'''

public static boolean IsAbundent(int x){
int a = 1;
for(int i=2;i<=Math.sqrt(x);i++){
if(x%i==0){
a = a + i + x/i;
if(i==x/i){
a = a - i;
}
if(a>x){
return true;
}
}
}
return a>x;

}

I suck at spelling properly

[ocean harbor]

you can do the code by writing this "```"

[jagged forge]

can u put that in triple back ticks like this: ```java

before and after

just edit the original lol

and backticks not quotes

`

[ocean harbor]

[sleek pagoda]

I confused

what

[ocean harbor]

let me do it for you

public static void main(String[] args){
        ArrayList<Integer> myNumbers = new ArrayList<Integer>();
        HashSet<Integer> abundantNumbers = new HashSet<Integer>();
        int a = 395465626;
        for(int i=0;i<28124;i++){
            for(int j=0;j<28124;j++){
                if(IsAbundent(i) && !abundantNumbers.contains((i+j)) && i+j<28124){
                    if(IsAbundent(j)){
                        abundantNumbers.add(i+j);
                        a = a - (i+j);
                        System.out.println(a);
                        System.out.println(i+j);
                    }
                }
            }

        }
    }```

public static boolean IsAbundent(int x){
       int a = 1; 
        for(int i=2;i<=Math.sqrt(x);i++){
            if(x%i==0){
                a = a + i + x/i;
                if(i==x/i){
                    a = a - i;
                }
                if(a>x){
                    return true;
                }
            }
        }
        return a>x;

    }

[jagged forge]

put “java” right after the first backticks plz

i need syntax highlighting

[sleek pagoda]

ok

[jagged forge]

like ```java

[sleek pagoda]

I think the problem is in the IsAbundent

[jagged forge]

im gonna do this for my own sake

[sleek pagoda]

Isn't this the same

[jagged forge]

wait it’s not highlighting

[sleek pagoda]

Yeah

It already highlited

[jagged forge]

discord is biased against java

[sleek pagoda]

for you I think

[jagged forge]

oh maybe it’s cuz im on mobile

well im on pc and its better

[burnt ledge]

yeag theres no syntax highlite on mobile

[jagged forge]

lame

[burnt ledge]

idk why i wish there were

[jagged forge]

tbh i have met more girls who code on this server than in my whole life

actually thats not true

but my workplace has 2 women coders and thats it

[storm sage]

That is quite sad

I think my uni's CS department has a roughly equal number of men and women students

The faculty is almost all male though, I think

[jagged forge]

hm

[sleek pagoda]

I think I'll just put the question in help

[jagged forge]

👍 im still looking at it but ill find u there

[sleek pagoda]

help 8

[sleek pagoda]

I found the problem

[jagged forge]

oh. nice!

[sleek pagoda]

The bounds

are too big

[jagged forge]

ah well i cant see the numbers in the original problem statement

so i never would have gotten that lol

[sleek pagoda]

yeah

In the help channel

I sent a better one

I should've started with it

[prisma plinth]

JAVA YIPPE

[ocean harbor]

cringe

[ocean harbor]

^

[ionic briar]

Is there anyway to get immediate help in my math question

[jagged forge]

i heard u like java. so i put some factories in yo factories so u could make objects that make objects that make objects

[jagged forge]

!help

[quasi jetty]

Please read #❓how-to-get-help

[jagged forge]

he asked for help and i gave it to him

[wet berry]

Accidentally clicked the sticker

[jagged forge]

oh

thought u were protesting my harshness

that's a cute sticker tho

[cold rivet]

ask a question

[ionic briar]

I already posted it

[cold rivet]

wrong place but can i make a motor without magnets?

im fascinated at how electricity is made, and i have copper, magnets, led lights, but magnets dont last forever.

i mean they last a long time but yknow

[jagged forge]

wikipedia says early motors used the electrostatic force

my very limited knowledge of physics suggests that that would be very weak though

[cold rivet]

literally static electricity?

that is weak

[jagged forge]

isnt the electrostatic force like how two wires have a tiny amount of force between them?

[cold rivet]

we were both wrong

its just magnets

or “cuolomb force” in chemistry

same idea, though.

but in electro static stuff the magnets arent moving fast

[jagged forge]

https://en.wikipedia.org/wiki/Electrostatic_motor it says its just the repulsion/attraction of charges tho, no magnets involved

this other website i found mentions coulomb force tho

wait, isn't that just attraction/repulsion of charges

[cold rivet]

magnets are charges

its like using graphite to write, but im referring to it as pencils

[cold rivet]

yes

[jagged forge]

are all charges magnets?

[tribal fable]

what is the definition of a magnet? Something that has a magnetic field?

[oblique beacon]

2 poles.

[cold rivet]

wait is N + 1 just a backup?

its literally just “how many backups are enough”

[random atlas]

what does the "Pending G+" role mean/do?

[surreal sapphire]

either someone applied for the grad role or they selected grad during onboarding and then never applied

it does the same thing as the undergrad/advanced role

[neat lintel]

Ello ...

Discussion-2 ^^

[tame egret]

hi

[cold rivet]

guys

leanord hayflick is still alive????

wtf???

[patent knoll]

can someone solve the 3x +1 equation?

[faint garden]

Wdym "solve"

It's an expression not an equation

[jagged forge]

he's probably talking about solving the collatz conjecture

[languid marten]

They meant collatz ig

[tame egret]

3x + 1 = 3x +1

solved

[storm sage]

No, no one yet

Terence Tao and co. have come close though

They've proven it holds for almost all numbers

[languid marten]

hehe almost

[jagged forge]

never trust the world ‘almost’ in mathematics…. especially in number theory

[storm sage]

Lol

[faint garden]

I wonder what almost means in this context. Like I guess if you proved it for all even numbers you would have proved it for half the natural numbers.

[neat lintel]

electromagnets

[storm sage]

There's a formal definition that I don't recall but one common thing to look at is for example the percentage of numbers under some number n that it's true for and then look at the limit as n -> infinity

Almost all in that context would mean that the percentage approaches 100% as n -> infinity

I don't recall exactly what it means here

[jagged forge]

I think that is called natural density

[storm sage]

Yeah although if you prove it for all even numbers, in this case, that automatically implies it's true for all the odd numbers too

Because every odd number gets sent to an even number after one step

[cold rivet]

well yea but doesnt the electricity to magnetize them, like, completely fuck up their efficiency?

[cold rivet]

the answer is that it always goes back to 1

solved it

[maiden locust]

https://youtu.be/LDQV2vUocyw

[neat lintel]

Permanent magnets decrease in strength overtime

Electromagnets work as long as you have electricity, which you should have since the magnets are in a generator

[storm sage]

Please don't spam the same link in multiple channels

Especially not other people's help channels

[serene pulsar]

The test was rescheduled due to a power outage, which is good for several reasons. For one, I forgot to get my disability accommodations 😓, but I was able to get them with the reschedule. For two, I have more time to study! And third, I got to see the type of calculator that will be used on the exam. I haven't used a graphing calculator since high school and I was worried about it lol.

[desert crest]

hi

[ocean harbor]

Hello

[rocky shuttle]

hewwo

[storm sage]

glad you could get the accomodations! :)

[serene pulsar]

Thank you!!!

[wicked ore]

@tribal basalt I think it's simpler than 2 pages

I was doing it myself

The markings can either be TFF, FTF, or FFT

The first case results in nonsense

The second case results in choosing T1 or T3 equally

The third case results in nonsense

i've changed my mind

[tribal basalt]

I'll reply in a bit, toilet give me a moment

[wicked ore]

this is an interesting problem

[tribal basalt]

I also realised that my note is wrong cuz I read a line wrong from the solution lol

[wicked ore]

I actually don't know the answer

wtf

[neat lintel]

just remagnetize them

its not that complicated

[tribal basalt]

Should we move to the questions?

I mean questino channel

[wicked ore]

sure yeah

[tribal basalt]

let me write it up again

gimme a moment

[tribal basalt]

I just wrote it up, I pinged you btw

[neat lintel]

[cold rivet]

hmmm how would i charge them if they are spinning?

[neat lintel]

if you dont mind how old are you?

look up electromagnets

its how motors work?

almost all energy is some form of water wheel

https://tenor.com/view/water-wheel-mill-gif-19806697

[cold rivet]

bro i know what electromagnets are and how they work

i just dont understand how electricity is like

made

yknow, the complicated part they gloss over in school?

“oh it just displaces electrons”

and thats it

[gaunt quest]

wdym made

[gaunt quest]

I mean EM fields are probably a bit much for like high school physics

[neat lintel]

The magnets aren't spinning

[neat lintel]

electrons

its not complicated

[cold rivet]

i mentioned that

but its always confused me

[cold rivet]

what is spinning?

i need like a js paint drawing

[neat lintel]

the rotor

the rotor is rotating

[cold rivet]

ok

im gonna find a photo

[cold rivet]

so the copper is rotating?

[cold rivet]

also why does it have to be wires? is it just easier?

[neat lintel]

the wires are there to

umm

i forgor

[cold rivet]

the wires take the electricity away?

i also thought magnet in middle spin?

and it was like on an axis

[neat lintel]

there is no magnet in teh middle

oh wait

[cold rivet]

i know like 8 things about this

its not a lot but i know

[neat lintel]

n the majority of designs the rotating assembly in the center of the generator—the "rotor"—contains the magnet, and the "stator" is the stationary armature that is electrically connected to a load.

I guess I was wrong, the magnet is on the rotor, the majority of times

[cold rivet]

i think one side could rotate the magnet

like to generate energy

and the other side has like electricity going into it

[neat lintel]

electrons

[neat lintel]

its all been figured out already

even nuclear power plants use what is essentially the water wheel

[cold rivet]

yes

[cold rivet]

i know

[gaunt quest]

oh I just think I understood the question

are you asking how electric generators work?

I am a bit slow sorry :P

[neat lintel]

You should watch this cool video series

https://www.youtube.com/watch?v=p8pdCOLzO74

or this https://www.youtube.com/watch?v=tiKH48EMgKE but it's lame

[cold rivet]

this

[cold rivet]

i understand the key concepts quite well actually and im familiar with them

but when the magnet rotates

all that information goes away

[cold rivet]

thx for video tho

[gaunt quest]

I'll just quote Wikipedia here

When the flux changes—because B changes, or because the wire loop is moved or deformed, or both—Faraday's law of induction says that the wire loop acquires an emf
from the magnets perspective the wire is moving

[cold rivet]

yes i understand that

i understand what it does but just not how it works

like wtf is the electricity?

where does it come from

electrons from the copper?

[neat lintel]

electricity is just moving electrons

[gaunt quest]

we're interested in potential energy here

[cold rivet]

yes

[neat lintel]

https://www.youtube.com/watch?v=7RpyURBNZyU

[gaunt quest]

when we're taking about there "being electricity" what we mean is that there is electrical potential energy

[cold rivet]

ive learned this all in school before, but im gonna watch the video to see if it adds anything

[gaunt quest]

in the case of the generator the motion of the magnet is resisted, and the resistance becomes emf

the kinetic energy is changed into potential energy

[neat lintel]

i think they know that

[cold rivet]

if electricity is a wave how is it moving also?

[neat lintel]

they are asking like the very basics

[cold rivet]

yes but sort of

[cold rivet]

i understand bits and pieces here and there yea…

[gaunt quest]

electricity isn't a wave

[neat lintel]

like fundamental particles type question?

[cold rivet]

pretty mich

[cold rivet]

i need so much help with this concept ima get einstein

[gaunt quest]

I think electricity becomes very complicated when we talk about fundamental particles

[cold rivet]

thats why i dont understand it when

jt like does somethng

[gaunt quest]

the easiest way to understand it for something like a generator is with EM fields

[cold rivet]

ok

[gaunt quest]

for our purpose, a field is just something that takes on a value at positions in space

[cold rivet]

uh

[gaunt quest]

like a function in terms of x, y, z or something

[cold rivet]

oh like literally just a space

[gaunt quest]

the exact choice of coordinates don't matter

[cold rivet]

ok

[gaunt quest]

when there is charge somewhere in that space, it affects the values the field takes

[cold rivet]

like the magnetic “energy”

[gaunt quest]

there are some laws we use to describe that derived from (or part of depending on how you look at it) Maxwell's equations

so physically we have just an electromagnetic field, but it's easier to think of independently as electric and magnetic fields

electric fields and magnetic fields then would be dual, they have a direct relationship with one another so if you mess with the magnetic fields you mess with the electric fields and vice versa. all according to the laws I mentioned

yk conservation of energy I assume, a generator is not making energy, just converting it

[cold rivet]

fuck it im taking physics

ive put it off for months

khan academy here i come

[gaunt quest]

based

[cold rivet]

i think a physics background would help with literally everything i do

[gaunt quest]

studying it is probably a good idea then :]

[cold rivet]

any notable resources?

[neat lintel]

electrons

[gaunt quest]

I think maybe part of your confusion here is that when we "generate energy" it's more than we're converting not useful energy to useful energy

[gaunt quest]

sadly no I was doing this in college

[cold rivet]

yes but like the electrons come from like thin air

[gaunt quest]

dropping physics now though, my resources will be my friends notes :P

[cold rivet]

quite literally

[gaunt quest]

nah they're just always there

[cold rivet]

yea….

[gaunt quest]

photons are what mediate the electromagnetic force which is why the whole particle view is tough

[cold rivet]

so the electrons start moving quickly around the wire and thats like just energy?

[cold rivet]

bro what

see im learning physics too

cus i dont understand how photons can affect anything

they have 0 mass

they bump into cones in my eye? and what?

that makes something happen?

[gaunt quest]

the electrons moving is more of an analogy, in copper wires they move relatively slowly

[neat lintel]

https://en.wikipedia.org/wiki/Electron

[gaunt quest]

they have momentum

[cold rivet]

silence wench

[cold rivet]

how they move at the same speed

[neat lintel]

READ IT

[cold rivet]

always

[neat lintel]

REAAAD IIIITTTT

[gaunt quest]

their momentum depends on their frequency, not their velocity

[cold rivet]

the wiki has 2 types of info

stuff i know and

fucking

de Broglie wavelength

[cold rivet]

h the b fax hkjeow jn no c bff ownq

cus its also a wave

oh god they changed discord mobile’s emoji stuff

but zamn

[neat lintel]

ok?

[gaunt quest]

p = mv is a classical mechanics thing and doesn't hold up well for fundamental particles without mass

[neat lintel]

thats the answer

[cold rivet]

… but protons are the only fundamental particle without mass, right?

im gonna go with my view of particles as things that are like, tiny fields that only affect other stuff when near that tiny field

0 dimensional objects

[gaunt quest]

there are two in the standard model, photons and gluons

[neat lintel]

yes putting the word dimension in and around other words makes us smarter but lets ignore de broglie wavelength because thats too much work

[gaunt quest]

that's accurate

[cold rivet]

the one that glues stuff together?

[gaunt quest]

yes :3

they mediate the strong force

[cold rivet]

wait really?

oh damn thats just how i explained tiny particle stuff i didnt understand

[gaunt quest]

fairly, we think of particles as not having any like volume or area or anything

[neat lintel]

isnt de brodlie wavelength taught in high school chemistry???

[gaunt quest]

so 0 dimensional is probably fine

[gaunt quest]

it was for me

[cold rivet]

i skipped that week

and i have a grasp on this stuff

[gaunt quest]

not very extensively covered tbf

[cold rivet]

(i was sick)

[cold rivet]

it was so bad

they dont cover anything extensively

[neat lintel]

you dont seem to

[gaunt quest]

they just kinda said "yooo he thought electrons could have wavelengths and Schrödinger equation woahhh" and then we just did Bohr model

[cold rivet]

you are giving like 2 word explanations idk what u mean

[neat lintel]

electrons bro

[cold rivet]

1

2

[cold rivet]

we didnt mention schrodinger at all

[gaunt quest]

we covered atomic orbitals so they mentioned where the orbitals come from

[neat lintel]

because its the answer. if you want to dive deep then you have to dive deep. idk why a 1000 character discord message you will read but refuse to read the wikipage on Electron ?

[gaunt quest]

but we never used them

[neat lintel]

[cold rivet]

exactly

[cold rivet]

because thats a level i can understand. wiki jumps from kindergarten info to phd stuff

also i gtg like brb in 5 mins

[gaunt quest]

yeah wikipedia is not the most straightforward source :P

[cold rivet]

id show you a photo of the moon

but mods wont let me

[gaunt quest]

1984

[cold rivet]

la sociedad de simios bosnios

[neat lintel]

search for the things you dont understand

[cold rivet]

no way really

[neat lintel]

I am smarter than the chemistry tutor

look at this problem

too much drawing

nvm

[neat lintel]

hey

[neat lintel]

U do realise he draws it out so that people understand, right?

[neat lintel]

yeah, i was gonna draw too

a simplier way

but

too much work

[river moon]

when you implement some complicated function minimization algorithm and use wolfram alpha to check answers and see that they're off by 0.08, search for bugs for over an hour and then realize you just forgot to add a 0.5 multiplier in wolfram alpha input

[rocky shuttle]

[maiden iris]

Anyone has UC’s group chat? Here or telegram

[serene pulsar]

The review today is going great. 33 questions and only 3 wrong, and for silly mistakes like forgetting a negative sign in my answer or forgetting to square both sides. I've done these in ~1.5 hours and this has really boosted my confidence. I think I just needed fresh air and proper sleep because yesterday I was drawing a blank at simple questions. Hopefully this streak continues, but I'm gonna take a break now while my e-ink device charges.

Also the actual test is only 20 questions and I have 3 hours for it with my accommodation.

[proven plinth]

are eink devices good

[serene pulsar]

I think so but I use them because my disabilities make it harder to use real paper.

I've heard mixed opinions, but I love mine.

[ripe dirge]

No good old pen and paper?

[serene pulsar]

No, but I think I'll have to use them on the real exam 😓

I wish I could use my supernote on the exam for scrap paper haha

[ripe dirge]

I see

I don't like cbt tests at times

Computer based tests ****

[proven plinth]

what da hell is supernotes now

[proud olive]

Oh that's what you meant

[serene pulsar]

Supernote is the e-ink device I use

I got the A4 size but I write so big it's like A6 to me haha

[proven plinth]

interesting

looks pretty cool, always wanted something like that

if they were more affordable :-:

[serene pulsar]

Yeah I almost refunded mine just because I was getting anxiety over how pricy it was

[ripe dirge]

I still use the traditional stuff

[serene pulsar]

But the developer encourages selling used supernotes on the supernote subreddit and even in emails with them

[proven plinth]

same and sometimes I'm using illustrator with my mouse lmao

[serene pulsar]

The dev is very active in the community and is very open about the roadmap

Seems like a nice/chill dude

[ripe dirge]

I write pretty small so I am not going to run out of paper yet

[proven plinth]

idk, writing digitally like that is much better honestly

[serene pulsar]

Oh I also like reading books on the supernote since it has no lighting, it's super easy on the eyes. Almost like reading a physical book.

[ripe dirge]

Hmm

[proven plinth]

you got all the colors you want on 1 pen, as much size as you want and simple storage

[ripe dirge]

Good for you

[serene pulsar]

Plus they recently added a feature to share your screen to any browser and I absolutely adore it. Makes it so easy to take quick copies of drawings

[proven plinth]

I'd have anxiety tho taking it to classes lol

[serene pulsar]

Haha I don't even take mine outside cause I don't want it to get dirty/damaged.

[harsh merlin]

i love maths

[calm crystal]

Good news for you

There's a lot of that here

[mental stratus]

sup discussy the second

[mint patio]

What’s the stats test called again where you want a measure of whether changing the independent variable caused the change in dependent variable?

[alpine comet]

What? 😄

[mint patio]

I forgot all my stats lol

I have a set of 53 entries split into groups of 4 (representing quarters of a year from 3/31/2010 to 3/31/2023)

And to each entry I have a specific value associated with it

Now, my independent variable is that every so often I change something

[mint patio]

And I want to see if changing my independent variable was what caused the change in value corresponding to that quarter

[gaunt quest]

you're looking for correlation or something?

sadly I'm dogshit at stats so I'm no help here

[mint patio]

I don’t know what I’m looking at anymore I’m so frustrated 😭

[tight comet]

Sounds like in general you want to look at some sensitivity measurements

[mint patio]

dw I don’t need it anymore :D I’m gonna die

[tight comet]

X_X

[neat lintel]

Is my brain broken if i read this

and come up with the equation

$$ a + \abs{a-s}(0.7)^t$$

[fathom swallow]

brandon_hu

[neat lintel]

where a is the air temperture,
s is the temperture of the soup at t_0

also how do you simplify this?

[sonic field]

wat class dis is

[storm sage]

Can you explain your reasoning

Actually

Let me just comment

It seems like you're assuming here that the soup temperature is always greater than the air temperature (which is correct)

So instead of |a - s|, you can just write (s - a)

[neat lintel]

[storm sage]

so you get a + (s - a)(0.7)^t and then no further simplification is really required, just plug it into your calculator

Oh I will say, be careful because it says "every 5 minutes"

So you'll want to take that into account somehow

[sonic field]

yeh

[neat lintel]

[sonic field]

what class dis is

[storm sage]

Newton's law of cooling

[neat lintel]

idk i just stole it from #help-9

[sonic field]

LOL

well I ask because if it's college algebra, you could jus get the newton's law of cooling formula

but calc 2, you can derive it directly from a differential equation

the 5 minutes will be used to figure out your cooling or warming constant

[storm sage]

LOL asking someone else's help question in #serious-discussion while you're helping them

Try not to do that lol

[solar hawk]

lol

[jagged forge]

I feel like this technically has many solutions. Surely you can add a funnily shaped sine wave with a period of 5 minutes and it still works out

[storm sage]

technically but there's only one "right" solution

[jagged forge]

Oh I’m definitely being pedantic. but imagine you set out to prove mathematically that the solution was only that one… and then you’re like, huh.. that doesn’t seem right

The younger version of myself probably would have tried and failed to do so

[storm sage]

yeah haha

[neat lintel]

Its Souls vs the living ?

No

(i) Souls + Living = All Souls

& (ii) RULE: Souls cannot be expressed as Math (or objects even theoretically)

< end program , run program > < it worked ! >

(useful if you are trying to teach a computer to be a good souless program)

(the above is what you tell a cpu if you want to make sure it doesnt become terminator before you tell the CPU anything else)

[ripe wasp]

what 💀

[neat lintel]

hashtag : computational first inputs , offered as an example of a LLM AI programs who act like humans regulator

copyleft , all rights can go to discord's Index Ventures investors

[neat lintel]

working on a math thing

[sonic wind]

you can't "tell" a computer this, given that it's in english

computers don't understand english

[neat lintel]

NLP exists

[static loom]

MLP*

[river moon]

nonlinear programming

[burnt ledge]

Multilinear programming

[rocky shuttle]

my little pony

[mental stratus]

martin luther ping

[wet mortar]

@mental stratus

[mental stratus]

what

[wet mortar]

ping

[mental stratus]

yoo anyone else have math tattoos on their body?

[rocky shuttle]

no, but what's yours?

[mental stratus]

i don't have a math tattoo on me?

[rocky shuttle]

oh I thought you had one since you said "anyone else"

[neat lintel]

when added i am a 2 digit number and when multipled i am a 1 digit number??

[rocky shuttle]

if you had to put math tattoos on your body, what would they be?

[long matrix]

\upsilon\omega\upsilon

[mental stratus]

idk lol

probably some analysis result

[rocky shuttle]

\epsilon<0

[mental stratus]

\leq

[wet mortar]

which

[neat lintel]

$\sigma - \sigma$

[fathom swallow]

Nidhi

[minor current]

xD

[proven plinth]

$\Delta \omega \Delta$

[fathom swallow]

Maggi

[river moon]

$\nabla \underset{\omega}{} \nabla$

[fathom swallow]

transparent_elemental

[deep mango]

Had to? Lord

Hmm

Maybe a little cantor set

Like the construction not the end result

[proven plinth]

cantor set art

[rocky shuttle]

poor tattoo artist if they had to tattoo the end result

a dynamical donut around the arm would be nice

[proven plinth]

on a scale from 1 to 10 how much would you hate getting the quadratic formula tatooed on your neck

[rocky shuttle]

would you like this tattooed on your neck

[proven plinth]

naaaa thanks

[deep mango]

I was thinking something like that but it would be hard to get something with enough irrational slopes to be satisfying

I think id want a more subtle tattoo than that probably

[deep mango]

That's like an 8.5

And only because im leaving room for levels of hatred i havent conceived of yet

[rocky shuttle]

why not cover your whole body with the formulas on mathcord's server banner?

[deep mango]

Ill get rycheese factory tattooed on my forehead

[rocky shuttle]

shuwi react with :rycheese: pls

[rocky shuttle]

you mean on the back of your bald head

[deep mango]

It would be difficult for them to put it there

[rocky shuttle]

why? it's not like you have hair there

[nocturne skiff]

why this specifically

[rocky shuttle]

idk ask why maggi is named maggi

[nocturne skiff]

how is it pronounced

everyone i know says majji

[mental stratus]

~

[neat lintel]

i love maggi

[broken night]

its megi

[nocturne skiff]

proof?

because google kinda agrees with me

[rocky shuttle]

@winter hinge

The German word "Informatik" is usually translated to English as "computer science" by universities or "computer science & engineering" by technical universities (German equivalents for institutes of technology). Depending on the context, "informatics" is also translated into "computing", "scientific computing" or "information and computer technology". The French term "informatique" was coined in 1962 by Philippe Dreyfus.

[winter hinge]

I'm french though
Jk

[broken night]

ask any malaysian

they will know

[nocturne skiff]

Sad that I don’t know any lol

[rocky shuttle]

The term "informatics" is used with a different meaning in the context of library science, in which case it is synonymous with data storage and retrieval.

[winter hinge]

Dreyfus at it again

[broken night]

https://www.youtube.com/watch?v=uwPXrkuTSYo play 0:49

[broken night]

brah help me with myy mathh

zyzz brah

[nocturne skiff]

i’m not up for the job 😔

[nocturne skiff]

I stand corrected

[broken night]

okay i helped you with your pronoun

help me back lah

[proven knoll]

before I used to do exercises in stem books
now i skip them for the sake of time management

[storm sage]

That habit might come back to stab you in the back later

A lot of the times the exercises are crucial for understanding the content, at least in mathematics

It depends what you want your comfort level with the material to be though

[languid marten]

hmm yeah but exercises take a LOT of time tbh

[storm sage]

Yeah

Worthwhile time though

If you want to understand the concept

[languid marten]

Yeah

I only do the challenging exercises and skip the obvious (or the ones which are obvious to me how they will be done)

This saves some time and doesn't hinder the learning/understanding part

[echo tundra]

megi? I always pronounced it mag-ii

[broken night]

country?

[echo tundra]

India

[broken night]

maybe diff pronoun for each country

[echo tundra]

I guess so

[rocky shuttle]

maggi

[proven plinth]

[shrewd flower]

[split pawn]

Okay I think I should start it

I am not responsible for the post. Please contact the respective poster (fox news totally)

https://twitter.com/KMPHFOX26/status/1682778779771449344

Come on

yucky embed

I think UFOs will show more general presence now

Earthlings need to be frightened

[neat lintel]

[echo tundra]

This looks like a flying piece of kurkure

[split pawn]

Burning through the atmosphere

[ancient lance]

this looks very much like an edit imo

[neat lintel]

nah, the aliens just decided to appear

the same day the US is holding a conference about UFOS

[ancient lance]

why is it that the videos are always from the US

[neat lintel]

totally not someone seeing the news and wanting to lie

[ancient lance]

lol

[modest rune]

this looks like someone badly photoshopped the millenium falcon oer their nest footage

[echo tundra]

I'm gonna run this through an AI image upscaler to see what it really is

It looks even more bizzare lmfao

[ancient lance]

now that I look at it, yeah, that's what it is

[split pawn]

Sure

Well the link's up there, you can see the vid

It didnt embed idk why

[tall minnow]

Thanks to people crying wolf now even if actual aliens visit no one will completely believe

[storm sage]

Unless they already have

[flat harbor]

if i was Dr. Jordan Peterson..... (ahhhh) i would ask you...... (mmmmm) to define the words..... (hhhaaa) alien.... and visit....... and believe.........

[long matrix]

well let me introduce you to ryc.

[serene pulsar]

🥁
I got a 95% on the Level 6 (hardest) placement test! The one question I got wrong I only got wrong because I forgot a negative sign in my answer. 😅

All that studying paid off!