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420chan is Getting Overhauled - Changelog/Bug Report/Request Thread (Updated July 26)

Watch my set please

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- Fri, 18 Nov 2016 11:24:03 EST FFd5rNZG No.15275
File: 1479486243372.png -(17046B / 16.65KB, 800x600) Thumbnail displayed, click image for full size. Watch my set please
Hey /math/, can you guys watch my set for me? I'll be right back.
17 posts and 6 images omitted. Click View Thread to read.
Hugh Guffingfield - Wed, 09 May 2018 12:39:40 EST NVr7Ludj No.15649 Reply
1525883980610.jpg -(8175B / 7.98KB, 331x240) Thumbnail displayed, click image for full size.
You know what blocked me in college? Discovering water-tight proofs. I honor and love solid proofs but sometimes you be sittin with a coffee and whiskey in your lap makin pen mark on the paper and all you're operating by is your intuition. Don't let yourself be in the canyon lookin up from the bottom of proof atomics. We can occupy ourselves forever with hairsplitting and defining what we already know. Let's use a crutch like we've always used. Call it axiomatic if you're more comfortable with it. The point is, you're on the struts that have made the building... you don't need to look up from the bottom of the hole to see the top of the building. Be creative. Be a true mathematician. Don't get stifled by proof theory. Get some muthafuckin coffee, get some whiskey, and worship the primes and break bank encryption. A2Ten@4TwentyFourAndUndUn*EstarStar
Sidney Pickbanks - Sat, 19 May 2018 00:59:50 EST drSlH/C1 No.15655 Reply

The vast majority of mathematicians don't understand how inference rules and logic actually work from an axiomatic level.

Math Learning

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- Fri, 04 May 2018 01:28:37 EST YcbvwtmL No.15647
File: 1525411717764.png -(84925B / 82.93KB, 340x340) Thumbnail displayed, click image for full size. Math Learning
Help a dummy out and name the best websites to learn math on. Thanks frens!
Sophie Hegglepan - Thu, 17 May 2018 19:21:52 EST rkLtn+N1 No.15654 Reply

Just post your question here and I'll get back to you in like 4 to 6 weeks.


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- Sun, 16 Jul 2017 12:43:38 EST Rhgh4/nK No.15536
File: 1500223418101.jpg -(12838B / 12.54KB, 398x66) Thumbnail displayed, click image for full size. Calc
Can anyone tell me where to begin with this problem? I'm clueless. Our professor didn't cover it. I imagine start by taking d/dx and plugging the values in at some point?
5 posts omitted. Click View Thread to read.
Ian Chollystock - Thu, 28 Dec 2017 23:16:23 EST QQuXTugO No.15599 Reply
1514520983608.png -(15127B / 14.77KB, 615x345) Thumbnail displayed, click image for full size.
What I would do first OP is I would graph the function and look at the range between 0 and 4 on the X axis and see if there's an obvious maximum. In this case, it looks like there is one.
Edward Grimridge - Fri, 20 Apr 2018 19:17:39 EST H+Iq8AnM No.15645 Reply
So Mins, Maxes, and Extrema are Calculus concepts. You'd have to find f prime or f'(x) which is the same thing as the derivative. Derivative is -e^(-x)x^(2)+2e^(-x)x you would then set that function = 0 and find the x's. x should = 0 and 2 Make a line and write down x = 0 and x = 2. Then plug in -1 to derivative check if value is - or +. If negative, funciton is decreasing from -infinity to 0 and if positive, function is increasing from -infinity to 0. Plug in x=1 and do the same thing as before. Find out if answer is negative or positive. and plug in x=3 and do the same thing once more. Max value should be when function goes from increasing to decreasing or positive to negative.

Statistics Question

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- Sun, 18 Feb 2018 16:36:31 EST JCgRdXcX No.15609
File: 1518989791203.png -(16921B / 16.52KB, 350x291) Thumbnail displayed, click image for full size. Statistics  Question
I'm helping a friend with her thesis and I can't decide what statistics test to use.

She has an experimental and control group, and she also data on the group members' gender. We've determined the emperimental group had higher test scores, which is a simple t-test.
If she wants to measure *if girls or boys in the control group had higher test scores*, what would be the test to run? Independent samples t-test can't be used because there's overlap in the groups.

Do we just look for correlation?
Thank you.
Esther Manningwill - Sun, 18 Feb 2018 17:57:13 EST sR7kJ2DP No.15611 Reply
I actually figured it out right after I posted it, but there's not a delete thread option anymore. Nobump!
Molly Mommerbury - Wed, 11 Apr 2018 13:55:37 EST 81ybSDIP No.15641 Reply
lol. based on what I've seen from these other threads, no one would have helped you anyways.


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- Thu, 08 Mar 2018 16:48:27 EST mqHT9rw/ No.15620
File: 1520545707636.webm [mp4] -(1304906B / 1.24MB, 296x240) Thumbnail displayed, click image for full size. Statistics
Sup /math/

Over the summer I am going to be taking my first statistics course. The specific course I will be taking is listed as a 200-level psychology class rather than a straight math class so I am guessing statistical analysis will be related to health/psychology research or something? I have never taken statistics before, but I have a pretty good foundation in mathematics. I have been through differential equations and physics, should I expect much of a challenge? Any general tips/tricks/insights to the study and application of statistics?

>tl;dr: me don't know statistics. wat u know?
Ernest Cliddlehall - Fri, 09 Mar 2018 07:04:02 EST J2H8HCRl No.15621 Reply
it's not really like physics or diffeqs at all. the basis of statistics is very classical probability which itself is based on combinatorics (counting things) for a class like the one you will take. if its from the psych department then theyll probably gloss over the foundations, i.e. probability, and go straight to tests of significance, power of tests, etc. There aren't any tricks, just understand the formulas for the statistics.
Lillian Bardford - Tue, 13 Mar 2018 03:01:51 EST a/tOQ260 No.15623 Reply
maxwellian tails are where all the fun is at
Shitting Bebblepane - Mon, 19 Mar 2018 00:34:15 EST sR7kJ2DP No.15633 Reply
I'm doing a Stat PhD.
In the entry-level stuff it will seem boring, probably. If you have a strong math background, you're going to see a lot of big-sigma summation.

If you have any interest in Stats at a higher level, it becomes "probability theory" in the Math department and gets super interesting, and modern physics is basically built on it.
However the first stat class isn't super interesting and I got a B.

if game theory is real why am i lonely?

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- Tue, 13 Mar 2018 02:59:26 EST a/tOQ260 No.15622
File: 1520924366876.png -(294204B / 287.31KB, 690x397) Thumbnail displayed, click image for full size. if game theory is real why am i lonely?
any why are so many math experts lonely? i'd bet the average game theory expert has substantially less social interaction than most people.

is this the biggest mathematical debunking of the 21st century so far?
Shitting Bebblepane - Mon, 19 Mar 2018 00:30:43 EST sR7kJ2DP No.15632 Reply
I'm not an expert on game theory but I don't see where the fuck it says being good at math means you have a ton of friends.

I think the average math expert doesn't want a ton of social interaction...I have to work and concentrate a shitton so I can't hang with a lot of people but I don't feel lonely. That's just me though.


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- Wed, 29 Mar 2017 16:37:10 EST uqJv93qR No.15439
File: 1490819830015.png -(109711B / 107.14KB, 790x726) Thumbnail displayed, click image for full size. Hyperoperations
Does anyone have any ideas about pic related?
31 posts and 7 images omitted. Click View Thread to read.
George Brookhall - Wed, 21 Feb 2018 20:56:05 EST VjgGp8YW No.15612 Reply
Wow this was almost a year ago. I'm still interested in this, or at least doing some kind of project with /math/.
Nathaniel Fivingville - Mon, 05 Mar 2018 03:49:41 EST Hv35haoR No.15618 Reply
one of the fundamental rules of imageboards is that if the text on the image is illegible in the thumbnail then you don't open the image to see what it says
Samuel Smalldock - Sun, 18 Mar 2018 11:08:31 EST 0xJCov/D No.15631 Reply
That hasn't been my practice. Moreover, I'd hope that the people on /math/ would be a little more charitable.

Top 10 favourite Integers

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- Fri, 04 Nov 2016 15:38:05 EST 9bYxsT36 No.15261
File: 1478288285194.jpg -(104652B / 102.20KB, 640x427) Thumbnail displayed, click image for full size. Top 10 favourite Integers
Hey guys what are some of your favourite integers? Here's my top 10:
10. 34,236
9. 8
8. 457,893 ( I bet some of you thought this would be higher!)
7. 43.
6. 6 (Imagine that!)
5. 240
4. 9000
3. 7,777,777
2. 7, 777,771
  1. 108
17 posts and 6 images omitted. Click View Thread to read.
Lillian Bardford - Tue, 13 Mar 2018 08:36:55 EST a/tOQ260 No.15624 Reply
the square root of 2
the square root of the square root of 2
one half
the square root of 3
the quartic root of 4
the square root of negative 2
napier's constant
the square root of napier's constant
one half pi
pi squared
Frederick Fanningpatch - Sun, 18 Mar 2018 02:24:21 EST drSlH/C1 No.15630 Reply

Sorry buddy, but the gas you've been smoking has made you all 'tarded

Complex Analysis

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- Tue, 08 Aug 2017 21:15:47 EST 2Nfpe0g9 No.15547
File: 1502241347722.jpg -(39592B / 38.66KB, 331x499) Thumbnail displayed, click image for full size. Complex Analysis
Can somebody explain to me why I need to take a Complex Analysis class?

I'm doing a MS Mathematics and going on to a PhD in Statistics/Probability

I don't see any fucking point in studying Complex Anal.
1 posts omitted. Click View Thread to read.
Walter Davinglock - Mon, 11 Sep 2017 09:56:07 EST wdbZy6Bd No.15560 Reply
Yeah...actually I tried not taking it and my advisor said I have to.

Tbh now that I'm in the class it ain't bad. But I wanted to take a statistical theory course and own i cant.
John Gemmertut - Sat, 23 Dec 2017 07:59:50 EST 18TzhZsM No.15597 Reply
complex analysis is useful for a lot of things in math. Since your ms is in math and not statistics, complex analysis is considered an essential core course, like abstract algebra or real analysis. With your PhD studies in mind, complex analysis can be useful because it gives a way to evaluate a lot of different definite integrals over the entire real line. Even for real-valued functions, we can sometimes solve otherwise impossible integrals by passing to the complex plane, taking a clever contour, and then taking the limit as the contour expands. This comes up when you are trying to find the fourier transform of certain functions, for example, or when you want to integrate certain PDFs over the entire real line. It's a useful class anon. Even if it doesn't seem like it. Lots of great statisticians were at least proficient in complex analysis.
William Dranderfotch - Tue, 13 Feb 2018 20:08:22 EST Y3TAINA4 No.15607 Reply
Haha Then why are you studying math? You could say the same about most math subjects. I've had complex analysis twice already once for bachelors and once for masters. It is used throughout many other fields of math and used gratuitously by physicists.


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- Tue, 06 Jan 2015 10:34:20 EST zBSUDYOt No.14551
File: 1420558460949.jpg -(7183B / 7.01KB, 206x245) Thumbnail displayed, click image for full size. Felps!
Hey guys is there a free site to where you can choose which kind of math problems to take that isn't khan academy? I ask because either later this week or the week following I'll be taking a placement test to try and save money at college and to get back where I left off when I gave a shit about school. Thanks.
George Blackridge - Tue, 06 Jan 2015 10:36:27 EST zBSUDYOt No.14552 Reply
Kind of like a random question generator or something to that extent.
Hedda Hommleforth - Tue, 06 Jan 2015 17:08:20 EST HeP0kpt9 No.14553 Reply
Just download textbooks or look up "high school algebra problem set" or "calculus problem set" or something.

Seriously, though, textbooks are where it's at.
Molly Findleville - Sun, 11 Feb 2018 08:17:09 EST P9TKAH4B No.15605 Reply
I'm thinking about creating something of that sort. Like code wards but math wars. Although people are already using mathoverflow for that

Pickung up mathematics again

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- Fri, 09 Feb 2018 13:05:24 EST GjyUyNd4 No.15604
File: 1518199524302.jpg -(526599B / 514.26KB, 1200x1606) Thumbnail displayed, click image for full size. Pickung up mathematics again
So i've got a question regarding university level math. I'd like to start studying Business Informatics. I'm currently working as a developer at a bank, so that's probably an advantage.
My problem is that I basically dropped learning mathematics when we started with functions like f(x)=12x²+4x³+23 and stuff like that. It's not that I'm not good, I had a few bad teachers and even more personal problems. Now i want to gitgud again.

So what resources should I consider? I'd like to get a some good recommendation regarding university-level mathematics that start small but go big.

Math help

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- Sun, 03 Dec 2017 12:53:39 EST iVRKbSmx No.15591
File: 1512323619034.jpg -(707975B / 691.38KB, 1920x1080) Thumbnail displayed, click image for full size. Math help
Help me solve this equation for a,b,c, & d ...

3a - 4b + c - d = 0
2 posts omitted. Click View Thread to read.
Ian Chollystock - Thu, 28 Dec 2017 23:12:11 EST QQuXTugO No.15598 Reply
The fact that the equation is using the variables "a, b, c, and d" and it that they are equal to zero implies that this is a 3D plane equation. Like other people have pointed out, there are infinitely many points that would satisfy this equation in Euclidean space because geometrically speaking you can place an infinite number of points on any given plane.
Emma Blullershit - Wed, 31 Jan 2018 09:04:20 EST 04lDhCQC No.15603 Reply
If it's over a finite ring there might only be finitely many points on the hyperplane.

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