Some people prefer those
#🍁・general-2
unreal pagoda
gusty ermine
But it wasn't in this case. Because Amaroq's original answer confused wolf
unreal pagoda
Sometimes large explanations and discussions confuse people further, because they are still learning. Sometimes you have to be gentle when people are still learning
gusty ermine
So I wanted to understand where the confusion came from and give light to it
unreal pagoda
I understand. It's okay to want to gain understanding
gusty ermine
I mean I wanted to understand what Amaroq meant so by working together we could give a definite and accurate answer to wolf
unreal pagoda
I think that's a fantastic idea, in theory. In practice though, maybe it could have been best to take it to another channel. Wanting an understanding is one thing, but honing in on one tiny detail in a sentence is another.
You know people think on different levels and different ways. Sometimes people disagree even though they are saying the same things. Just because your experience is different, or someone takes a different path to the same understanding. You may like the long detailed all-in explanations with all exceptions included, and others may want a simple "yes/no" and then learn the extra info later. that doesn't make you or anyone wrong for thinking differently. @gusty ermine
Reminds me of a disagreement I once had with my mother... 
"This orange paint is awful"
"Ma, its yellow"
"No it's orange that's why I choose it"
"No it's yellow and that's why you hate it"
I was honing in on one small detail (yellow/orange), when I should have paid attention to the fact that she hated it, whatever color it was called.
Imagine if my dad jumped in the conversation "should we repaint this?" 
gusty ermine
Wolf wasn't satisfied with a simple yes/no. That is why, after days searching online for an answer, he came back here and asked a question (it was a translation) which was previously answered by Amaroq and deemed incorrect even though technically it wasn't. I assume that people are in these channels because they want to help, just like me, and they wouldn't see a problem in me questioning their answers because I wanted to understand it so I could help the learner. I assume that that person wouldn't think I was questioning or criticizing him because he would know that we are both working towards the same goal
unreal pagoda
But could you have given lobo an answer without asking amaroq? Was the paint still ugly whether it was orange or yellow?
gusty ermine
I wanted for us to come to a conclusion so wolf wouldn't be confused instead of giving him separate opinions
unreal pagoda
That wasn't "yes" or "no". Try it sometime :)
gusty ermine
What do you mean?
gusty ermine
No, I just don't like to come to a conclusion without being sure of it being correct
unreal pagoda
Shit happens ;) I hate that too but sometimes shit happens.
Don't over think it, just accept it. namaste. (I have no clue what that actually means)
unreal pagoda
Even if you had an understanding, a complete 100% comprehension, how do you even know you'll be satisfied? Life's biggest mystery
Again, gracias ticky ticko
gusty ermine
What do you mean?
rain ermine
thats philosohpical af
gusty ermine
I just wanted to understand what you were trying to say
unreal pagoda
Mhm
unreal pagoda
No I think marin just needs a hug
gusty ermine
maybe they didnt need you in their conversation
Perhaps, if you exclude the fact that it was me who started the conversation and tried to help wolf
unreal pagoda
Marin needs to know everything will be okay
A universe hug
From the powers that be
gusty ermine
And it's an open channel, I think that you can join conversations if you're also trying to help the learner
real imp
yeah but you were asking stuff and they didnt feel like answering them
like just let them be
unreal pagoda
I like to do that :D but then I say "wait, I will probably just confuse someone"
What questions* have been discussed now for over an hour that haven't been answered yet? @gusty ermine
gusty ermine
Why try to help somebody if you're going to drop the discussion in the middle?
unreal pagoda
math gods please be summoned!!
rain ermine
what is the square root of pi
real imp
a quarter pie
exotic kiteBOT
🆙 | Nilfirith has given @unreal pagoda a reputation point!
umbral fog
@real imp not a math god, but I would like to help.
unreal pagoda
nil did something nice for me. The gods have answered. I hope it was not a mistake
median trail
hey what's your question? @real imp
real imp
none yet
unreal pagoda
real imp
you can't define C = {(−1)n: n ∈ N} by extension, can you?
i just said C={n∈N / n*2}
or like, C={(-1)^0; (-1)^2; (-1)^4...(-1)^(n*2) / n∈N}
idk if its correct
median trail
Wait so is it (-1)^(n)?
real imp
wait tf
no nevermind
result doesnt have to be natural lol
the original thing is C = {(−1)n: n ∈ N}
thats the set
median trail
okay, and what are you trying to do
real imp
but i just come to realise it doesnt ask for the result to be natural
just the exponent
i have to determine all elements
which is impossible in this case
impossible by extension, anyway
median trail
yeah I mean this set has an infinite amount of elements
real imp
idk how to call it in english but i can only do it by comprension
median trail
Let's see if I get it. You were provided with a set, and you have to find a general formula that represents all elements in the set?
median trail
Ahhhh I see
real imp
it is possible in the first two
wait no
wrong one oops
thats the one
it is possible in 1,2 and 4
but not in 3
median trail
you mean it's impossible because the set has an infinite amount of elements, right?
real imp
A = {0; 1; 2; 3; 4; 5}
B = {0; 1 ;2 ; 3}
D = {(1+sqrt(2)/2; (1-sqrt(2)/2}
real imp
you mean it's impossible because the set has an infinite amount of elements, right?
@median trail yeah
median trail
there are only two
median trail
{1, -1}
median trail
remember that natural numbers can be even (2k) or odd (2k+1)
real imp
yes
real imp
wait so im not looking for n?
hm
yeah im not
wow ok
that makes a whole lotta sense
median trail
No, you have to read that like
"C es el conjunto de los elementos (-1)^n tal que n pertenece a N"
*
median trail
okay
real imp
i guess what im looking for is that the result of the sine is not a decimal
median trail
what are you struggling with
A es el conjunto de sin(n pi/4) tal que n pertenece a N*
real imp
in know that the sine function goes between y=-1 and y=1
and it repeats every uhhh
every 180 deg
median trail
sine can be anything, n can only be natural
median trail
rad is fine
median trail
I mean, if you have something like pi/4 then the teacher will assume that's radians since radians doesn't need a "unit" that represents them. Degrees uses °
pi/4 <= it doesnt have anything so it's radians
4° degrees
median trail
I'm gonna write a table for you, give me a second
that set goes from -1 to 1
@real imp
abstract scaffold
you can refer to this triangle for pi/4 angles.
median trail
I see you are a man of culture 
but yeah the set A goes from -1 to 1 because the sin (n pi/4) is not multiplied by any number
past harbor
Borra esa pizarra con alcohol 😄
median trail
But it will get dirty pretty soon again 
past harbor
Si la limpias con alcohol, se quedará blanca y se verán mejor las cosas
abstract scaffold
refer to this triangle for pi/3 and pi/6 angles.
real imp
@median trail no entiendo la tabla aaaaa
Why does the set go from -1 to 1 there??
Apart from the function graph
median trail
because if the sin(x) is not multiplied by any number then the output doesn't change, so it keeps ranging from -1 to 1
abstract scaffold
refer to the unit circle for pi/2 and 0 angles
median trail
because remember you have to find all the possible values of sin(npi/4) when n is natural
abstract scaffold
which question r we talking about?
real imp
Yes
median trail
it goes from 1 to -1 all the time
real imp
But between those number there are infinite numbers
Right?
Like, how do I define that
median trail
and the output (-1 to 1) doesn't change unless you multiply the sinx by a number, let's say 2sinx, in this case 2sinx goes from 2 to -2
abstract scaffold
I think there's 5 values in that set.
median trail
yeah exactly
wait really F14?
Oh yeah it's true
because you are dividing a circle into 4 parts, right?
abstract scaffold
given that n is a natural number, find all sin(npi/4) solutions
real imp
Whats the fifth? 0?
abstract scaffold
what values do you have so far?
real imp
Actually
abstract scaffold
sin(1*pi/4)
abstract scaffold
ok, yeah. i got taught that too in one of my classes. there's a debate whether 0 is natural or not...
well, let's start with 0 then
sin(0*pi/4)
real imp
Ok, 0
abstract scaffold
sqrt(2)/2 refer to my triangle
real imp
I dont know how to read that triangle
abstract scaffold
median trail
I think these are all the possible values
abstract scaffold
sin = opposite/hypotenuse
the hypotenuse of my triangle is sqrt(2)
the opposite is 1
for angle pi/4
therefore sin(pi/4) = 1/sqrt(2)
real imp
Ah okay
abstract scaffold
rationalising the denominator, you get sqrt(2)/2
ok, next value, sin(npi/4) for n = 2
real imp
I dont refer to the trangle for that one, right?
abstract scaffold
the angle is pi/2, you refer to the unit circle definition of trigonometric functions
gusty ermine
Sohcahtoa sohcahtoa sohcahtoa
real imp
xd
abstract scaffold
sine is the y coordinate of the unit circle
at angle pi/2, as seen in edsel's circle pie diagram thingy... you see it's right at the top
the y coordinate is 1 there
so sin(pi/2) = 1
abstract scaffold
note, cosine is the x coordinate {can verify by drawing triangle definitions onto the unit circle} and thus cos(pi/2) = 0
yes, sin(3pi/2) would be -1
you skipped n = 3
and n= 4 and 5.
median trail
abstract scaffold
though if smart, u know which ones to skip
real imp
Okah so n=3 would be sin(sqrt(3)/2)?
abstract scaffold
sin(3pi/4) = sin(pi - 3pi/4) = sin (pi/4) = sqrt(2)/2 {All Students Take Cocaine}
real imp
LOL
abstract scaffold
sine is positive in the second quadrant. because it's the y coordinate
real imp
Ok
My head is processing too much rn wait
Ok so:
n=0, f(x) = sqrt(2)
n=1, f(fuck
No i dont understand reeeeeee
abstract scaffold
if you have a calculator, a way to check exact values for angles pi/4, pi/3, pi/6, you can square the trig function and i'll give you a rational function, then you square root it afterwards on paper.
e.g. if you just type sin(pi/4) into ur calculator, ur just gonna get horrible decimals.
if you type (sin(pi/4))^2, you will get 1/2
write sin^2(pi/4) = 1/2 onto your paper, then square root that on your paper
now you can see it's 1/sqrt(2)
real imp
I actually lost my calculator...
abstract scaffold
well rip
median trail
what do you not understand? so that we can help you
real imp
How to get to the numbers
abstract scaffold
like sqrt(2)/2?
real imp
I dont know like, Im having trouble comprehending the whole thing
Big ass knowledge gaps
Its okay I will research it later because I really cant grasp the whole concept and i hate that
real imp
Ok so, @median trail @abstract scaffold
Is it readable?
I basically just substituted the numbers until I saw it starts looping
(also remembered you told me it divides into 4 parts)
wait no
it doesnt loop
it continues until n=8
because it still has all the negative results left
unreal pagoda
The pencil is kind of light
real imp
its the camera yeah
unreal pagoda
It'S tHe cAmEra
real imp
🙂
rain ermine
How can I fix write protection
Help
I need to fix this so I can access my nostalgic photos
rain ermine
Uh
real imp
it has a little phyisical switch on the card
rain ermine
rain ermine
I do
vestal pine
@past harbor quieres aprender el japonés?
vestal pine
lol yo tampoco
unreal pagoda
What do you say when the number 8 tastes really good? @past harbor
unreal pagoda
"Delici8"
calm flax
porelculotelahinco
past harbor
Madre mía..
unreal pagoda
past harbor
Esta cuarentena con vosotros va a ser muy difícil
calm flax
que va
unreal pagoda
Oh lobo
calm flax
este servidor está más vivo que nunca
calm flax
no but he is
good
unreal pagoda
No, Gracias xD
median trail
@ashen mist could you please explain me what the Ethernet protocol is about?
unreal pagoda
Will jaleel come back? 
ashen mist
@median trail no recuerdo tantos detalles, pero es un protocolo que se usa para transmitir datos entre dos computadoras a través de un cable
el protocolo de IP lo usa muchas veces, así que ethernet es re común en el Internet
tiene su propia forma de packet, y se llama "ethernet frame"
su header tiene información como las direcciones de MAC de la computadora que envía/recibe los datos, cuál tipo de protocolo va dentro del payload (por ejemplo, para decir que este ethernet frame contiene datos de IPv4)
median trail
@ashen mist This pink frame is going from the hub to the laptop with the IP 172.16.31.2, why does the access point retrieve the same frame to send it back to the two laptops whose IP starts with 10?
I have a lot of questions about networking, please tell me when you can answer all of them
ashen mist
quién dice que es el mismo frame?
median trail
well it is, it went from 172.16.31.2 to 10.10.10.3
then it went back
because it was a ping
ashen mist
un frame sólo existe entre dos computadoras adyacentes
para mí, la carta rosa representa el mensaje de ping
median trail
it ends like this
ashen mist
ah, un hub envía un mensaje a todos las computadoras que estén conectados al hub (excepto la que envió el mensaje)
o sea, la respuesta va desde 10.10.10.3 hasta el router, y desde el router hasta el hub al que 172.16.31.2/3 están conectados
el hub va a enviar el ethernet frame del router a los demás, es decir, a 172.16.31.2 y a 172.16.31.3
pero el ethernet frame dice en su header quién es el destinario, así que 172.16.31.3 va a recibir una copia y la va a ignorar ya que la dirección de MAC no es la de 172.16.31.3
median trail
but the frame is not in the network of the AP then why does it send it anyway?
ashen mist
y 172.16.31.2 también va a recibir una copia, y la va a aceptar porque las direcciones son iguales
172.16.31.2 envía un frame al router (para iniciar el ping), y el router envía otro frame al punto de acceso para traspasarlo a 10.10.10.3
no sé mucho de los puntos de accesso inalámbricos
median trail
Okay, another question, what's the ARP table?
ashen mist
básicamente dice cuál es la dirección de MAC para una dirección de IP que conoce una computadora
o sea, cuando uso el protocolo de ARP para determinar la dirección de MAC de mi vecino 10.10.10.1, la voy a guardar en mi ARP table para no tener que preguntársela cada vez
median trail
and why does some packets not have a destination MAC address?
ashen mist
cuando pregunto por la dirección de MAC de alguien, no tiene sentido incluir destination MAC porque no la sé
o sea, no hay un "destinario fijo" en una solicitud de ARP porque hay que preguntar a todos
mañana te ayudo más - me tengo que ir ahora pero mandame más preguntas
also, no deberías decir "packet" a los ethernet frames
"packet" usualmente se refiere a IP packet
past harbor
@gleaming slate Deja de enviar audios de manera random en los canales, por favor.
gleaming slate
Ok no sabia
abstract scaffold
@real imp it loops every 2pi not pi since the period of a standard wave function is 2pi. so in that case until n=8.
in that case A = {-1, -sqrt(2)/2, 0, sqrt(2)/2, 1} For A = {sin(npi/4) | n is a natural number}
abstract scaffold
and I think you wrote A = {-1;0;1}. Try to separate the elements with commas rather than semi-colons. It didn't restrict sin(npi/4) to be an integer, it only restricted n to be a natural number the value of sin(npi/4) only depends on n being a natural number, not restricted to being an integer itself as well, so thus -sqrt(2)/2 and sqrt(2)/2 can be included. (this is for sin(pi/4) and sin(5pi/4))
past harbor
Ordenarlo 😄
fallow dock
I guess you feel... ampowered
median trail
hahahah that's a mess, I won't arrange it
junior thicket
Anyone here like physics? 
median trail
me
junior thicket
Epic shh I'm doing hw
rain ermine
Ok fine go on
junior thicket
"Un perro recorre una línea recta de 73.1 metros con rapidez constante de 122 m/s. Después recorre 73.1 metros más con una rapidez de 3.05 m/s. Calcular la rapidez media del trayecto completo"
Qué fórmulas debo usar? 
past harbor
Madre mía. Yo no me acuerdo nada de esto 😄
median trail
in this case v = (vf - vo)/2
junior thicket
Oh gosh thank you
junior thicket
Soy un asco despejando. Por qué no pueden dar todas las fórmulas posibles y ya?
rain ermine
Asco despejando 
junior thicket
True
Idk how to say despejar in english 
It's like when you take a formula and you change it depending on what you need
Like F= m.a turning into a= f/m
past harbor
abstract scaffold
rearranging the equation to make a the subject
median trail
I'm not that sure how to solve that exercise given that you have two differents values for the velocity
Maybe you have to find two velocity averages then sum them?
junior thicket
Noooo 
mortal dagger
primero calculas cuánto avanzó con una velocidad, después con la otra
para calcular la distancia, es solo d = v*t
y después rapidez_media = d_total / t_total
también se puede calcular como el área bajo la curva de la función velocidad con respecto al tiempo
o sea, acá daría 2 rectángulos, la suma de las áreas de esos 2 es el resultado
junior thicket
@mortal dagger pero ya tengo las distancias. Primero recorrió 73.1 metros con una rapidez de 122 m/s y luego 73.1 metros más con una de 3.05
Entonces sería... calcular el tiempo?
t = v/d???
junior thicket
Ah
Entonces calculo el tiempo 1 y el tiempo 2 y luego ya encuentro la rapidez
Ok
mortal dagger
rapidez_media = (d1 + d2) / (t1 + t2)
junior thicket
median trail
@ashen mist I don't understand what Port-based Memory Buffering and Shared Memory Buffering are
ashen mist
ehh no los reconozco jaja
median trail
Don't worry I just found a good resource for those
I have to get through my networking class homework
ashen mist
no recuerdo si nos enseñaron esas cosas
thin copper
It's cool when you enjoy something. Edsel must be having fun. 
median trail
I don't understand this question
@ashen mist wireless frames don't use mac addresses in the layer 2?
median trail
I don't know how to use excel 😅
I'm even planning on using gyazo to get the tables from excel
ashen mist
patrón de direccionamiento es "addressing pattern"?
no sé, esa pregunta no tiene sentido para mí
ipv4 es ipv4
a menos que hablen de class A/B/C/D etc o CIDR
also, se usan direcciones de MAC en wireless, no? al menos con 802.11
median trail
@ashen mist is the arp table the same for all devices in a network?
median trail
Engineering students be like:
fathom flame
Día 7: El sujeto trata de encontrar una manera de crear comida usando materiales caseros.
grizzled hedge
lol
placid flicker
@rough lava remember how we were arguing about There's and There're
I was thinking about how Spanish does the same thing with Hay, where it's technically the singular but applies to both singulars and plurals
Maybe it's a common thing in language for the word for "There being" something just evolves to use the singular for both over time
and English is just on its way to making "there's" the correct word to say
rough lava
"just on it's way" i'd already say it's pretty correct lol
if you're writing in the professional media you avoid the contraction completely as it is technically kind of a gray area
but other than that, everyone uses it naturally with no problem
ashen mist
@median trail cada computadora mantiene su propia tabla de arp
Y el contenido depende de con quién habla una computadora, así que van a ser diferentes
Además, no creo que la tabla de ARP de una computadora tenga una entrada para su propia dirección de MAC
Así que si computadoras A y B están en una red y se hablan, la tabla de ARP de A va a tener una entrada para computadora B, y la de B va a tener una entrada para A
No son iguales
Por eso es una técnica común para ver quién más está en una red
Por ejemplo, si soy hacker y consigo acceso a computadora A, podría ver su tabla de ARP para averiguar quién más está en su red, cuáles son tus direcciones de IP
En Linux, la podés ver con arp -a o con ip neigh
En Windows creo que también es arp -a
junior thicket
@placid flicker hay isn't singular it just works for both singular and plural
fallow dock
net-tools está deprecated desde hace milenios, pls no usen arp en Linux 💀
median trail
@ashen mist If I were looking at how frames move from one pc to another when using the ping command, but instead of using IPv4 addresses I use IPv6 addresses, would this process be quite different?
ashen mist
Dentro del header, el frame va a decir que contiene datos de IPv6
Aparte de eso, no creo que el proceso sea diferente
O sea, el frame va desde una dirección de MAC a otta
Otra
median trail
exactly, that's what I was thinking
If I delete the ARP table of a computer, the mac addresses table of a switch that's on the same network gets cleared too?
merry riverBOT
ashen mist
@median trail no, hacer algo con la tabla de ARP en una computadora no va a editar la tabla de otra computadora
Que yo sepa jaja
rain ermine
I just realized my cpu uptime is almost 7 days
shrewd pendant
Reinícialo
rain ermine
Nah
fathom flame
Don't worry Berban, Epic knows what to do.
sacred harbor
fallow dock
si alguno usa Raspbian, les pasa que Chromium carga los mapas de Google Maps invertidos?
o cualquier build ARM de Chromium
aunque no sea en Raspbian
glass dragon
@safe igloo you might find this interesting
My whole life I've always heard bronchitis pronounced "brong-kitis" but my husband says "bron-kitis" and it's always very jarring to hear him say it
safe igloo
@glass dragon do you or other people do this non-assimilation in other words too?
glass dragon
I'm not sure. I'm trying to keep an ear open for it now that you've pointed it out
safe igloo
Allright. It seemed weird to me because I thought this assimilation phenomenon was universal for all English speakers like in Spanish
There's another one I've read about and which I employ sometimes and which I've heard sometimes too which is when /t/ becomes assimilated to another consonant
Eg 'it carries' >'ik carries'
This one isn't done by as many people though
glass dragon
Hmmm, I don't think I assimilate. I say i -glottal stop- carried
safe igloo
Yeah I think that's the most common fate of /t/ before most other consonants
icy pollen
@median trail no estoy seguro si tu pregunta ha sido respondido pero no, el tabla de arp no es borrado en otra computadora, sólo borra el tabla de la computadora que estás usando
icy pollen
hola
vital ginkgo
hi
rain ermine
hehehe 7 days
sacred harbor
3 cores?
rain ermine
yes es poco
gusty ermine
Quebec considera poco probable que los estudiantes de primaria y secundaria regresen a clase a fines de marzo en el contexto de la pandemia COVID-19.
El primer ministro François Legault dice que está estudiando la opción de reabrir escuelas a principios de mayo.
median trail
Why is my router's mac addresses table empty? @ashen mist
real imp
because you dont have apple products in your network
shrewd pendant
🥁📀
glass dragon
Because female vocalists are awesome
rain ermine
well
glass dragon
let me get mine
rain ermine
its all i listen to 
glass dragon
I've been listening to a lot of music during this social distancing
rain ermine
me too
grim lava
Mmmm
shrewd pendant
where's that chart from epico
median trail
I've been in social distancing my whole life
glass dragon
glass dragon
yeah lol
rain ermine
listening report
glass dragon
you get to it from your profile page
rain ermine
you like a lot of rap and hip-hop 
shrewd pendant
oh nice
rain ermine
not my preferred genre at all
rain ermine
i see
shrewd pendant
mine's skewed by my brother cause we share a spotify
I haven't been listening as much as him lately
rain ermine
oh
rain ermine
im like at 13%
shrewd pendant
on the mainstream o meter?
shrewd pendant
that seems low
shrewd pendant
but I know practically all those artists
glass dragon
billie eilish is only 14$ mainstream? 
rain ermine
yeah...
glass dragon
oh do you have pro?
shrewd pendant
right zzz lol
glass dragon
I want to do my mainstream-o-meter 😦
glass dragon
oh ok
rain ermine
just type in ur username
glass dragon
shrewd pendant
the problem is it only does the top 50
those represent a relatively small percentage of my total
glass dragon
here's my overall instead of last 3 months
glass dragon
oh wait I was going to follow him but then really I'm just following his brother
glass dragon
wow somebody's addicted to man of constant sorrow though
is it berban or his brother...? 
shrewd pendant
yeah sia is great
shrewd pendant
man of constant sorrow? when did that show up haha
glass dragon
and one of you loves the naruto theme song from season 1
shrewd pendant
that's my brother haha
glass dragon
it's a good song (the naruto one). It's my ring tone haha
rain ermine
im scrobbling too much today
barely 2:16 and already 50+
though people say its nothing
glass dragon
i need something new to listen to
I've been listening to pandora for a few days and their depth isn't that good
shrewd pendant
I haven't been able to listen to music while doing anything productive lately 😦
rain ermine
we are born is the best sia album period
glass dragon
well good thing there's no sense doing anything productive during this coronavirus
shrewd pendant
I still have to work
rain ermine
i dont like to multitask while listening to music
shrewd pendant
don't you ?
glass dragon
oh no
rain ermine
my parents do
rain ermine
wish them luck
glass dragon
good luck epic's parents
shrewd pendant
not from home epic?
rain ermine
nah
shrewd pendant
oh dang
rain ermine
my dad has to be out
shrewd pendant
hope they take all the precautions they can
rain ermine
and my mom works at a hospital
shrewd pendant
gl 😐
rain ermine
shes fine haha
glass dragon
my husband still has to work. it is a bit worrisome because he works with a bunch of peopl who think this is all a hoax
shrewd pendant
wtf haha
rain ermine
darn antivaxxers
glass dragon
and he has bad lungs because he got TB as a baby
and it's even stupidier because he has nothing to do because they shut down the other part of his industry
like, he does the paperwork for something that is currently shut down
but they're completely separate entities, so ....
rain ermine
YEP
glass dragon
Did you get assigned school work, epic?
shrewd pendant
no but a lot of people just keep it on in the background
rain ermine
yeah
shrewd pendant
yeah
glass dragon
That's what I do while I game
rain ermine
should i loop the girl you lost to cocaine
shrewd pendant
watch the video, it's neat
rain ermine
i think i have
shrewd pendant
I'm sure you already have
shrewd pendant
I think I liked sia more back then
rain ermine
im not a big fan of some people have real problems
but neither was i a big fan when i first heard we are born
now its my favorite
old sia was really good
shrewd pendant
is discord working
shrewd pendant
weird
rain ermine
so ill check on my phone
shrewd pendant
my other server doesn't seem to be loading
no I'm on pc too
nevermind it's back
listening to we are born right now, thanks for the rec
rain ermine
de nada
bold gull
Gotta repost this underrated meme
gusty ermine
median trail
Linear algebra friday
real imp
programming on ubuntu is quite an experience
Me: breathes
Ubuntu: ```Command 'breathe' not found, did you mean:
command 'oxygenate' from deb libbodyfunctions-bin
Try sudo apt install <deb name>```
abstract scaffold
@sweet cape i think i can remember some parts of dual simplex method
first step. turn all constraints to <= (less than or equal to)
second step. create your dual simplex table (adding in basic variables as well)
third step. choose your leaving variable (i tend to use the most infeasible row)
fourth step. ratio test |c_j/a_ij| where c_i is the reduced cost in z- row and a_ij is the constrant coefficient in the ith row and the jth column. {where your ith row is the leaving variable row}. choose the smallest absolute value ratio as your pivot.
fifth step. row reduce until every coefficient above pivot and below pivot is 0 (and that the pivot value is 1). your jth column you chose in the previous step is your new x_j entering variable
sixth step. go back to step 3 if there are still infeasible Right Hand Side, else use normal simplex method
dual simplex is an alternative to Big-M and two phase
sweet cape
Ohh yeah yeah
I’m downloading WinQSB because i was trying to use phpsymplex but that doesn’t work rn the reason being when phpsymplex doesn’t operate with 6 variables and 12 restrictions
It’s pretty hard
unreal pagoda
Este foto es muy popular, ahora.... Este tu, @past harbor? 
sweet cape
Sure
gusty ermine
@abstract scaffold can you help me with math
abstract scaffold
what up
gusty ermine
This one
Is A finding y value when it is 0; 45; 90; 135; 180; 225; 270; 315; 360(+45...)?
So A= {sqrt(2)/2, 1,-1,0}
abstract scaffold
you forgot 225/315 degress or n = 5 or n=7 so sin(5pi/4) = -sin(pi/4) for being in the third quadrant = -sqrt(2)/2
sin(7pi/4) = sin(-pi/4) = -sin(pi/4) = -sqrt(2)/2 for being in the fourth quadrant
basically A = {sin(npi/4) : n is a natural number}
or A = {sin(npi/4 | n is a natural number} translates to
A is a set {} such that it follows the rule sin(npi/4) given that (: or | means "given that") n is an element of the set of natural numbers.
the set of natural numbers are {1,2,3,4....} or {0,1,2,3,4,5....} depending on the author's definition of natural numbers, so always check on the book to see what they define as natural numbers.
sweet cape
I suppose that every “n” in each sentences would be a natural number
abstract scaffold
what I was trying to get at is some fields of maths like to define all positive integers including 0 as a natural number (e.g. discrete maths).
but other fields exclude 0 from the definition of natural numbers
sweet cape
@abstract scaffold how do you use dual simplex, i got confused with that
abstract scaffold
do you have an example?
sweet cape
Sure
abstract scaffold
I'm assuming you know how to do normal simplex
sweet cape
Yes, i do
So, it’s a sentences about example
But i was doing all steps like normal simplex
And i stopped to the solution because i didn’t get any solutions when i simulate that
abstract scaffold
ok, it seems to be a minimisation problem
abstract scaffold
where sum from i = 1 to i = 6 of x_i = min z
sweet cape
Exactlyyyyy
abstract scaffold
dual simplex, u need to change to <=
sweet cape
To >=
abstract scaffold
your original problem is in >= yes...
abstract scaffold
but for the dual simplex algorithm to work, all need to be <=
sweet cape
Mmmm
abstract scaffold
so multiply every constraint by -1
abstract scaffold
omg... just realised this is an IP problem as well... what a pain
yeah -x6 - x1 <=
sweet cape
Like -x6 - x1 <= -20
abstract scaffold
yeah.
sweet cape
Mmmmmm
abstract scaffold
why did u do x1+x6 >= 20
sweet cape
I was using phpsymplex
abstract scaffold
and not just x1 >= 20
sweet cape
well, i did it because the problem i need to put 2 times every period that police would do, because they work 8 hours every day, and xj means like every period that it means 4 hours
abstract scaffold
ah. i see. yes indeed
sweet cape
Let me see if i can do that in phpsymplex
abstract scaffold
for some reason my brain thought 6-2 = 8 hours already hahaha
sweet cape
Hahahahaha
Are you still ok?
Haha
Would i type xj = 0?
Like i have 6 variables but i still have 12 constraints
Or when i use phpsimplex but dual simplex i still can use same likes normal, right?
I don’t understand these part
abstract scaffold
phpsimplex doesn't support dual simplex method
only supports two-phase and normal simplex
sweet cape
Mmmm
abstract scaffold
in ur case, u have 6 constraints.
sweet cape
So you’re right
abstract scaffold
the x_i >=0 constraints don't count
abstract scaffold
this problem can be solved using two-phase, bigM or dual simplex
what do u mean by the xj=0 constraints?
sweet cape
Like x1,x2,x3... = 0
abstract scaffold
hmm... ur problem is a combination of dual simplex and IP
so x_i needs to be an integer
not just 0
elfin berry
Wow smart people can't relate
sweet cape
Lol
I could do that like
But if i’m using dual simplex i’d change the sign in every “xj”
Right?
abstract scaffold
in big M just leave it as >=
but dual simplex the coefficients need to be negative
and the rhs negative in this case
because ur original constraint was like x1+x6 >= 20
which implies -x1 - x6 <= -20
sweet cape
Mmmmm i see
abstract scaffold
this is what it looks like so far
this is where i can start the dual simplex algorithm
sweet cape
Ohhhh at this time is when i don’t know how do that
Let me see when i find this like you
Wouldn’t i change the Z instead of -x1 -x2 x3... - x6?
abstract scaffold
i just made instead of z = x1+x2.....
i did z - x1 - x2 - x3 - x4 - x5 - x6 = 0
abstract scaffold
yeah. just leave it like that then.
abstract scaffold
yeah
abstract scaffold
probably the answer. i haven't done it myself.
but yeah. that goes through the steps of the problem. convert into canonical form <=
sweet cape
Idk, because if i do that, when i’d find optimal solution it wouldn’t work
abstract scaffold
then add basic slack variables since <=
choose leaving and entering variables, rinse and repeat
abstract scaffold
similar. just it's a bit reversed
because ratio test is done vertically
rather than horizontally
abstract scaffold
in normal simplex, you choose the entering variable first and use ratio test to see which one leaves
in dual simplex, you choose the leaving variable first and use the ratio test to see which one enters
abstract scaffold
"excel" google sheets
sweet cape
Lol, i didn’t try it
summer rune
alguien person sabe sobre "oblivous transfer" en quantum computing*
sweet cape
I saw that, it isn’t so farther than my answer
But i don’t understand about these answers
abstract scaffold
for those slides. there seemed to be a primal problem, which got converted into a dual problem
so that normal simplex could be achieved, unlike in the primal
sensitivy analysis is used when you want to change some constraints or something similar because of different conditions, but don't want to solve the LP again, to see how sensitive the variables are to change without changing the optimal value.
sweet cape
Ok ok, i wish you the best, you teached me a lot, i thank you a lot!!
I didn’t know what about those analysis
abstract scaffold
that's a separate thing not related to dual simplex
sweet cape
By the way, i didn’t get an answer because that’s pretty hard to analyze the reason being when i can not how i can get each answer about xj
Ohh sure, i was using a simplex normal instead of dual simplex
abstract scaffold
in that case you gave be z = 180
it seems x1 = 50
x3 = 90
x4 = 10
x5 = 30
(when using the website)
so that means send 50 people intending to start the 2-6 shift
on the second 6-10 shift. no additional people need to be added since x2 = 0, the first shift people cover this.
on the third shift 10-14, add 90 people since the 50 people have done their 8 hours from x1.
on the fourth shift 14-18, add an extra 10 people, so now we satisfy the 100 constraint on the fourth shift.
on the fifth shift 18-22, the 90 people from the third shift are now gone since they worked 8 hours consecutively, so there are 10 people left, thus 30 people need to be added bringing the total to 40. {satisfying our constraint}
on the sixth shift (22-2), the 10 people starting shift 4 are now gone, leaving 40 - 10 = 30, so no new people new to be added to this sixth shift.
back to the first shift, the 50 people right are the start on a brand new 2am-6am day 2 shift...
etc....
sweet cape
Jesus!!
That’s so incredible
Thanks so much, that’s so enough to me
I’ll understand why does it start with 50 people when the constraint is 20 <= oh probably i know, but that looks so fabulous, you help me a bunch!
abstract scaffold
it's because the original constraint is just >= not =
then did <= because of dual simplex algorithm. yeh
we're trying to minimise the amount of people needed to recruit on duty.
but we don't need exactly 20 on first shift, just AT LEAST
and hopefully minimise that.... AT least. in this case, it seemed to be x1 = 50 {multiple solutions seem to exist}
abstract scaffold
here. i provide 2 extra solutions https://docs.google.com/spreadsheets/d/1SKkkNfn9G9tz9BPaulq-j-blNPd-2AQ8jZBPov1mcqo/edit?usp=sharing
with the same z = 180
i could probably find many more. but we're not after a specific optimal solution. we're just after at least one and that's it.
abstract scaffold
What I was scared about was when the x values somehow became fractions (which they can be, since this LP method is a linear program, not an integer programming)
to which extra steps would have needed to be taken if non-integer solutions were given and we had an extra constraint that x_i is an integer
past harbor
@unreal pagoda Jaja. Mucho me parezco yo a esos
unreal pagoda
still radish
race to weekly top 100
still radish
es bajo. todavia tengo 7.3% progreso
pero la cuarentena me ayudará
tienes una cuenta?
unreal pagoda
Joder eso devilweatherabuelita, y eso blogscot
Puedes ser numero 1000!
Creo en tu
still radish
gracias eres la mejor
alpine cradle
Hola Pixi 
unreal pagoda
Loxiiii
still radish
finalmente 
eager wagon
@still radish qué es eso?
still radish
clozemaster
I reckon it might be the fastest language learning tool
although it is mind numbing
still radish
mi objectivo es lograr 100% (fast track) durante la cuarantena
eager wagon
Oooh puedo aprender español desde el neerlandés en este sitio web
still radish
probablamente es mejor que aprendes en tu idioma nativo
será mas efectivo pero no estoy seguro
last loom
There's no "Learning English" option 
eager wagon
Cómo? 😮
eager wagon
rain ermine
whats the name of this website
eager wagon
rain ermine
i want to try it out to see if i learn anything
rain ermine
oh
last loom
ooooh I see... Up there it says I speak English... Makes sense
median trail
@last loom yeah you have to change your native language
I'm using french
to learn English
rain ermine
WHY DO I HAVE TO BE 16 YEARS OLD
median trail
why not
median trail
rain ermine
una mierda me pondre como 16 para que no me den banda
eager wagon
Puedes aprender cosas sexuales en este sitio web también, Edsel?
Quizá sea por eso..
last loom
isn't it more difficult to learn that way? @median trail
alpine cradle
hay Afrikaans también
eager wagon
Si no, no entiendo por que deberías tener 16 años para poder aprender un idioma..
last loom
There are bad words you can learn that are not allowed to kids
eager wagon
last loom
be careful learning languages
eager wagon
Puedes jugar con otras personas?
rain ermine
so far the stuff im being brought i know
last loom
It's cool that it has text to speech but the voice is too robotic for me to understand
gusty ermine
eager wagon
intoxicated
last loom
That's a +16 text
alpine cradle
Did you understand it, Epic?
last loom
What I mean by +16 text is that is talking about alcoholism and miserable lives
alpine cradle
then it's not harder 
rain ermine
ok
alpine cradle
Hi 
rain ermine
gusty ermine
Hello
exotic kiteBOT
🆙 | Pillow panda leveled up!
median trail
https://www.youtube.com/watch?v=gipmV7mpszY I love this video
median trail
My electronics teacher sent us some youtube links on some topics that are gonna be part of the midterm, and he isn't even answering our questions
hybrid hull
discord sigue cambiando mi token de usuario
Estoy intentando conseguir una lista de los miembros de un servidor con la api
Con Python
median trail
okay
hybrid hull
Estoy preguntando si alguien sabe por qué
sweet cape
Cada cuanto cambia el token?
hybrid hull
Sólo cuando envío una solicitud para todos los miembros del servidor
sweet cape
here. i provide 2 extra solutions https://docs.google.com/spreadsheets/d/1SKkkNfn9G9tz9BPaulq-j-blNPd-2AQ8jZBPov1mcqo/edit?usp=sharing
@abstract scaffold oh my lord, that looks better than other online calculators.
I’ve been trying how can i do that without use other simplex like “dual” but that’s imposible.
I mean it’d better anytime that i can try at least the rules to discover or to know which one is correct or optimal solutions, i didn’t send this exercise because i needed the last part but i feel comfortable rn because i learnt a new thing!
That’s awesome!!!
Mm que raro, yo uso un token pero para el ingreso a la cuenta, como 2FA
eager wagon
rain ermine
abstract scaffold
@sweet cape i dunno. the only other two methods i can think of that will also work for this problem is two phase or big M
sweet cape
I used big M but that was simplex method, i didn’t get a real answer, that looks weird, i didn’t try two phase
abstract scaffold
what do u mean not get a real answer. u didn't get z = 180 and the corresponding x_i solutions? @sweet cape
median trail
@abstract scaffold could you please explain me why if one vector can be wrote as the lineal combination of other vectors, then these vectors belong to the same plane (plano?)
for example this. I hope you can understand it
abstract scaffold
let's say you have vector (a,b). this is a 2d vector. there's no way you can make this a 3d vector. I can make it into other vectors in the 2D plane
any other combination of 2D vectors can belong in the plane of 2 dimensions.
median trail
Hmmm...
abstract scaffold
in that example. you have a 3D vector
with aribitrary coordiantes (x,y,z)
it follows the rule of being a linear combination of the other 2 vectors v_1 and v_2
the fact is, it's not part of the whole 3D plane, the R^3 plane
median trail
hmmmm... I didn't understand the last sentence
abstract scaffold
=wolf graph 5x - 2y - 3z = 0
rotund pawn
abstract scaffold
see that plot, as long as the vector is in that orange plane. it's a valid vector following the rules of the linear combination of v_1 and v_2
median trail
hmmmm...I just don't understand why 😄
I can understand why if two vectors belong to the same line, and you sum them then the result stays in the same line
abstract scaffold
I have trouble looking at 3D vectors myself lmao.
2D kinda make sense that it makes a triangle
median trail
still radish
cool maths gents 👍
median trail
I like linear algebra but it's difficult to understand hahaha
abstract scaffold
yes. haha
median trail
this blew my mind :0
last loom
When the coronavirus outbreak ends, can all the countries in the world get together and pretend 2020 never started and start all over again?
smoky comet
/sounds of pessimist/
median trail
yes
fallow dock
I just woke up, is the planet still on fire?
still radish
siempre
green rampart
Siempre
median trail
@abstract scaffold I have a very important question, when we write a vector as the lineal combination of some others, for example
V = kV1 + mV2
then V1 and V2 could essentially be represented as a different coordinate system that was gotten from "moving" the cartesian plane? and k and m just tells us how V1 and V2 have to be transformed in this new coordinate system to get V?