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hmmmm by G Man - Tue, 24 Mar 2015 05:18:08 EST ID:nIRThw+j No.14662 Ignore Report Reply Quick Reply
File: 1427188688076.jpg -(42148B / 41.16KB, 721x303) Thumbnail displayed, click image for full size. 42148
Express 89.84 Mbps and 2.49 Mbps in bits per second (bps) using scientific notation.


probability by Phoebe Cliddlesure - Wed, 18 Mar 2015 01:56:40 EST ID:DYY7KYkl No.14645 Ignore Report Reply Quick Reply
File: 1426658200314.jpg -(132478B / 129.37KB, 698x332) Thumbnail displayed, click image for full size. 132478
If there is a function that returns a random number from 1-7, why can't I add the result of this function 5 times to get a uniform distribution of 5 to 35?

rand5() + rand5() + rand5() + rand5() + rand5() != uniform [5,35]

wtf I can't wrap my mind around why this doesn't work!! I've been told you can't sample a random uniform distribution to create a new random distribution and something about the central limit theorem. Can I get an intuitive answer?
7 posts and 2 images omitted. Click Reply to view.
>>
Cuntfuck - Thu, 19 Mar 2015 16:07:14 EST ID:xgdLZpNp No.14656 Ignore Report Quick Reply
Because that's not how random works?
>>
Priscilla Hezzlemore - Sat, 21 Mar 2015 06:14:50 EST ID:qz3c7Bt+ No.14658 Ignore Report Quick Reply
1426932890860.gif -(4378B / 4.28KB, 629x115) Thumbnail displayed, click image for full size.
You must use combinatorics.
>>
Priscilla Hezzlemore - Sat, 21 Mar 2015 06:20:27 EST ID:qz3c7Bt+ No.14659 Ignore Report Quick Reply
1426933227860.gif -(1566B / 1.53KB, 331x49) Thumbnail displayed, click image for full size.
oops that last part was not up to /math/ standards


Beginnings by Nemywa - Thu, 19 Mar 2015 15:26:51 EST ID:lxw6acDK No.14654 Ignore Report Reply Quick Reply
File: 1426793211813.jpg -(205881B / 201.06KB, 1024x768) Thumbnail displayed, click image for full size. 205881
>3rd yr Winter Semester
Currently taking :
>Calc 3
>Abstract Algebra
>Cryptography

I want to understand and design electronics but end goal is I Entrepreneurship

Course suggestions for my senior yr before I'm out in the wild?


Ability of other species to conduct mathematics by StellarCir - Sun, 15 Mar 2015 04:05:09 EST ID:M7BdweVS No.14637 Ignore Report Reply Quick Reply
File: 1426406709949.jpg -(652675B / 637.38KB, 1800x1200) Thumbnail displayed, click image for full size. 652675
I would like to postulate the question of which if any animals are capable of math besides Homo sapiens?

Some notable contestants:

African Grey Parrot, estimated to have the cognition/IQ of a 4 year old child.
Octopus, possibly the smartest creatures without a bone structure
Chimpanzees, our 'closest' cousins known to fashion tools
Crows, with a surprising brain-body ratio in proportion to Chimpanzees
Elephants, demonstrating self-awareness
Gorillas, historically taught to learn and speak sign language
Dolphins, our marine-mammal navigation crew on /1701/

Do you believe any of these animals could learn to use math? To what degree? Do you believe another creature could be a serious contender?
2 posts omitted. Click Reply to view.
>>
Fanny Wittinghut - Mon, 16 Mar 2015 15:53:08 EST ID:SpD/fp2u No.14641 Ignore Report Quick Reply
>Crows, with a surprising brain-body ratio in proportion to Chimpanzees
That's your description? Come on, crows have demonstrated some mind-blowing cognitive abilities.

But yeah, like Lillian says, so far it's all repetition and parroting from my understanding. Wouldn't it be cool to make it your life legacy to be the one who successfully teaches a non-human to math?
>>
Fanny Wittinghut - Mon, 16 Mar 2015 15:54:04 EST ID:SpD/fp2u No.14642 Ignore Report Quick Reply
>>14641
And you left out octopus, wtf.
https://www.youtube.com/watch?v=x5DyBkYKqnM
>>
Fanny Wittinghut - Mon, 16 Mar 2015 15:57:41 EST ID:SpD/fp2u No.14643 Ignore Report Quick Reply
>>14642
Actually you didn't leave out octopus, apparently I am drunk


Help learning gcse maths by Shitting Lightridge - Sat, 03 Jan 2015 10:45:28 EST ID:NxPbw8hD No.14549 Ignore Report Reply Quick Reply
File: 1420299928533.jpg -(111066B / 108.46KB, 603x376) Thumbnail displayed, click image for full size. 111066
Im 25 and im back in college learning maths.The lesson is only one 2 hour lessons a week and to be honest I feel like ive learnt nothing there at all.Its hard and I just seem t learn better by my self.

My problem I have though is where the fuck should I start of,there is so much shit I dont know like I barely even know what a fuckin prime number is.

I only want a c but I need that so I can go onto an access course.

SO what should I do to learn maths (I dont like khan academy found a few other sites though)

Like when I say what should I do what subjects should I Start of learning first ?
IM going to take the whole of next week while im still of work to learn as much so I need a plan on what to start of learning first.
>>
Alice Snodshit - Fri, 09 Jan 2015 07:33:19 EST ID:ev+cRfEi No.14555 Ignore Report Quick Reply
1420806799155.jpg -(15047B / 14.69KB, 460x348) Thumbnail displayed, click image for full size.
So at the moment Im trying to learn fractions but I keep on fucking up with baisc things like simplifying and converting ratios and the rest of it.

Im thinking I may need to go back a few steps as im not perfect with my time tables dont know all my prime numbers ect.
Wherre would you say I should start of with wht subjects ?

>btw Ive got to learn as muh as I can of thse by tuesday for a mock test im going to be doing

fractions
decimals
percentages

>algebra
simplify
expand brackets
factonise
Comment too long. Click here to view the full text.
>>
Hugh Collerfoot - Thu, 05 Feb 2015 22:24:09 EST ID:Gj+82UIb No.14595 Ignore Report Quick Reply
All you need is Basic Mathematics by Serge Lang. It covers everything, from the view of a professional mathematician explaining how the magic works. Torrents for it everywhere also can buy it used for cheap. Covers all of highschool and is a good precalc book.

After Basic Math get these short books:
How to Prove It: A Structured Approach
How to Solve it by Polya.

Now you are ready for any rigorous university level classes
>>
Rebecca Cushforth - Sun, 15 Mar 2015 04:25:46 EST ID:JDIWTmrz No.14638 Ignore Report Quick Reply
>>14549

Work through the following:

Algebra by Gelfand and Shen
Functions and Graphs by Gelfand, Glagoleva, and Shnol
The Method of Coordinates by Gelfand, Glagoleva, and Kirillov
Trigonometry by Gelfand and Saul
Kiselev's Geometry


Analysis by William Gissleville - Thu, 26 Feb 2015 17:18:10 EST ID:Yi4ytYm1 No.14616 Ignore Report Reply Quick Reply
File: 1424989090559.jpg -(25012B / 24.43KB, 344x475) Thumbnail displayed, click image for full size. 25012
Due to circumstances I was unable to participate in my first analysis course. Now I have to take the next one (individually both take half a semester). I want to go through the important parts of the previous course, but while there is practice material, there is no material with solutions. I asked my professor about solutions to the homework excersizes, but he isn't giving them. Does anyone know of any, preferably free, practice material? The topics coverd is basically this book, plus some extra stuff on sets (boundaries/compactness) and integration.

I did find this:
http://scholarstock.com/p/solution-manual-for-friendly-introduction-to-analysis-a-2e-2nd-edition-130457965/
But I'm not sure how trustworthy the site is.
6 posts omitted. Click Reply to view.
>>
Nigel Figgleputch - Wed, 04 Mar 2015 07:17:41 EST ID:weDVNH8d No.14627 Ignore Report Quick Reply
>>14624
I did not merge with the math community and neither had i very splendid start. So i need to be very self-reliant for now.
The professor who teaches analysis uses Tao's book. I like it except the fact it doesn't have solutions. Rudin's book has them, so good reason to train my devotion haha.

But there is also group theory and syllabus we got doesn't have solutions either. Anyone a good introductory book they're fond of?
>>
Nell Ceblingfoot - Mon, 09 Mar 2015 20:29:01 EST ID:JDIWTmrz No.14632 Ignore Report Quick Reply
>>14616
Read Baby Rudin. All the exercises are online.
>>
Hedda Niggerford - Mon, 09 Mar 2015 22:44:02 EST ID:Gj+82UIb No.14633 Ignore Report Quick Reply
>>14627
>group theory
http://store.doverpublications.com/0486477231.html

You can also pirate the Princeton Companion to Mathematics, which covers literally everything. There's plenty of recommended texts in it to dive further into material


just sayin by Nigger Drunkinstock - Thu, 05 Mar 2015 23:48:50 EST ID:PmLosP1P No.14628 Ignore Report Reply Quick Reply
File: 1425617330260.gif -(195877B / 191.29KB, 360x235) Thumbnail displayed, click image for full size. 195877
I like the idea of q-analogs but I think they're a little too advanced for selfstudy and that's all I've got at the moment.

I also like the idea of fractional calculus (same kind of realm in a way?) but that seems like something I could study on my own.
>>
Eliza Seggledet - Sun, 08 Mar 2015 01:45:50 EST ID:F9AJX/Os No.14629 Ignore Report Quick Reply
i like your picture.

although i dont get why they used (x^2)/2 instead of just x^2.
>>
Fanny Sacklested - Sun, 08 Mar 2015 06:04:20 EST ID:nxCnniYW No.14630 Ignore Report Quick Reply
>>14629
because (x^2)/2 is the antiderivative of x, and 1 is the derivative. its from the wiki page on fractional calculus.


always messing up the basics by Edwin Pimmleman - Mon, 23 Feb 2015 22:03:13 EST ID:zBSUDYOt No.14612 Ignore Report Reply Quick Reply
File: 1424746993952.png -(4013B / 3.92KB, 540x358) Thumbnail displayed, click image for full size. 4013
so anytime I see a problem like im about to write I always shit the bed and forget the basics with out further ado my nemesis so instead of simply giving me the answer Id rather like to have people interact with me as I try to preform this.
(2u^-5 * v^2
---------------
8w)^-2
so for starts I need to distribute ^-2

(1/4u^10 * v^-4)
---------------------
1/64w^-2
So if Im understanding this fraction within a fraction everything is going to switch between the numerator and the denominator except for 1/4u^10 because its not raised to a negative power thus.

64w^2 * 1/4u^10
-----------------------
v^4
then multiply the numerator
Comment too long. Click here to view the full text.
2 posts and 1 images omitted. Click Reply to view.
>>
Basil Donderwell - Wed, 25 Feb 2015 00:18:51 EST ID:zBSUDYOt No.14615 Ignore Report Quick Reply
>>14614
Fuck meant 16 but yeah can't do 17 either =\
>>
Jack Hammerfoot - Sat, 28 Feb 2015 03:01:48 EST ID:e+7yrnP7 No.14619 Ignore Report Quick Reply
>>14615
The key to the top part of 17 is knowing that
a^2 - b^2 = (a + b)*(a - b)
The bottom part is trickier, but one of the terms needs to have a 2x
>>
Jack Hammerfoot - Sat, 28 Feb 2015 03:02:52 EST ID:e+7yrnP7 No.14620 Ignore Report Quick Reply
>>14619
I guess i should say, it's not 'knowing' it's observing the algebra. Splitting these equations up is mainly a trial and error sort of deal where the more practice you get the faster/better you are


guides/tutorials by Betsy Pockville - Thu, 26 Sep 2013 03:14:08 EST ID:Mpud+AHb No.12970 Ignore Report Reply Quick Reply
File: 1380179648574.png -(22163B / 21.64KB, 1024x739) Thumbnail displayed, click image for full size. 22163
anybody have good simple tutorials/guides on using SAS and or LATEX?
6 posts and 1 images omitted. Click Reply to view.
>>
Nigger Nuddlehedging - Fri, 13 Feb 2015 01:10:35 EST ID:UXwZVF0/ No.14606 Ignore Report Quick Reply
>>14591

This.

Also, use gummi. It generates a pdf view of your document as you type, so you can see the changes you're making.

https://github.com/alexandervdm/gummi
>>
Walter Drendlekidging - Sat, 21 Feb 2015 13:38:57 EST ID:Dk8yywxc No.14610 Ignore Report Quick Reply
>>12970

Sage math cloud is great. You can do latex and other languages, and gives you a preview as you type that you can access anywhere.
>>
Nathaniel Sarringbire - Sun, 22 Feb 2015 23:00:38 EST ID:yFfkLiLW No.14611 Ignore Report Quick Reply
>>14610
Seconding Sage. Maybe it's because I'm a noob mathematician, but I've never needed another CAS. Can't beat free!

unless matlab counts as cas


Different ways to prove that the square root of any prime number is irrational by Adly Assaf - Wed, 17 Dec 2014 01:02:18 EST ID:XuUSwld1 No.14534 Ignore Report Reply Quick Reply
File: 1418796138255.png -(1345218B / 1.28MB, 1920x816) Thumbnail displayed, click image for full size. 1345218
And I'm not satisfied with the indirect proof:
x^(1/2) = a/b | If 'x' is prime and both 'a' and 'b' are integers
x = (a^2) / (b^2)
(b^2) *x = a^2| Therefore 'a' is a factor of 'x' and...
a=xc
(b^2) *x = (x^2)(c^2)
(b^2) =x(c^2)|.... 'b' is also a factor of 'x'
I don't think this is enough proof to go off of and say that 'x^(1/2)' is irrational, but I'm coming down off my coffee buzz right now and I wanna see what /math/ thinks while I brew the next pot.
1 posts omitted. Click Reply to view.
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Charles Murdford - Thu, 15 Jan 2015 19:56:16 EST ID:h2IBC+4I No.14564 Ignore Report Quick Reply
>>14534
Little late. I won't type out all the details but a wonderful proof of this goes like:

Let p be prime, GCD (a,b)=1, and p=(a/b)^(2) b neq 0. So

b^(2)p=a^(2)

Now consider the prime decomposition of a^(2). There has to be an even number of primes (a=p_(1)...p_(n) so aa=p_(1)...p_(n) which means there are 2n primes in the decomposition). Now look at the left side. A similar argument shows b^(2) has an even number of primes in it's prime decomposition, but p is also prime. So the left side of the equality has an odd number of primes in the prime decomposition and the right has an even. This contradicts the fund. theorem of arith. as the prime decomposition must be unique which means they have to have the same number of primes in their decompositions.
>>
Charles Murdford - Thu, 15 Jan 2015 19:56:59 EST ID:h2IBC+4I No.14565 Ignore Report Quick Reply
>>14564
made a mistake meant to say aa=p_(1)...p_(n)p_(1)...p_(n)
>>
Fuck Chundlechod - Fri, 13 Feb 2015 00:01:12 EST ID:lx6v5XWF No.14605 Ignore Report Quick Reply
1423803672404.jpg -(22794B / 22.26KB, 320x220) Thumbnail displayed, click image for full size.
>>14564
This one's from The Book!


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