### maths and other stories

#### 310 subscribers a community for 6 years, 6 months

last post 2055 days ago [+]

a selection of maths and other humorous creative stories

### For the crummy mathematician.

#### 6,136 subscribers a community for 5 years, 1 month

last post today [+]

This is a subreddit that is meant to be somewhere inbetween /r/math and /r/learnmath.

It is my hope that crummy mathematicians can discuss old ideas and prove old theorems and solve old puzzles here. Just because someone did it before doesn't mean we can't have fun with it, right?

This is a place where things like the Ulam Spiral and prime-rich polynomials are tolerated as reposts.

Please do use freely available resources where possible. Some crummy mathematicians aren't as fortunate as you are :)

This is our wiki and we encourage contributions of any sort, especially if they're interesting.

Post Spoilers in this format
`[X proves Y!](/spoiler)`

It will show up like this:

X proves Y!

**Using LaTeX**

To view LaTeX on reddit, install *one* of the following:

MathJax Greasemonkey userscript

TeXtheWorld Chrome extension

TeXtheWorld Greasemonkey userscript

`[; e^{\pi i} + 1 = 0 ;]`

Post the equation above like this:

`**[**; e\^{\pi i} + 1 = 0 ;**]**`

You may need to add four spaces before or put backticks around math fragments.

**Using Superscripts and Subscripts**

x*_sub_* makes x**sub**

x*`sup`* and x\^(sup) both make x^(sup)

x*_sub_`sup`* makes x*sub*`sup`

**Related Subreddits:**

- /r/mathematics
- /r/MentalMath
- /r/mathriddles

### Math Homework Reddit

#### 10,870 subscribers a community for 5 years, 9 months

last post 149 days ago [+]

**Welcome to the math homework help subreddit.**

This subreddit is mainly for getting help with math homework. However, math questions of all kinds are welcome. Please read the FAQ before posting. Please be careful with your superscripts, see here for advice.

**Using LaTeX**

### If Greasemonkey doesn't work **try this one**

Plugin based on TeX The World and modified by wsdenker.

`[; e^{\pi i} + 1 = 0 ;]`

You may need to add four spaces before, or put backticks around, math fragments.

**Custom superscript and subscripts (credit: /r/homeworkhelp):**

Here's the syntax:

- *_sub_* makes
*sub* - *`sup`* and \^(sup) both make ^(sup)
- *_sup_`sup`
*makes**sub*`sup`

* - *`sup`_sub_* makes
`sup`

*sub*

If you have trouble with spacing, add some blank spaces with \

```
2300H becomes 2300 H
```

# Useful Symbols

### Basic Math Symbols

≠ ± ∓ ÷ ∙ – √ ‰ ⊗

### Geometry Symbols

∠ ∟ ° ≅ ~

### Algebra Symbols

≡ ≜ ≈ ∝ ∞ ≪ ≫ ⌊⌋ ⌈⌉ ∘

### Set Theory Symbols

∩ ∪ ⊆ ⊂ ⊄ ⊇ ⊃ ⊅ ⊖ ∈ ∉ ℕ ℤ ℚ ℝ ℂ

### Logic Symbols

¬ ∨ ⊕ ⇒ ⇔ ↔ ∀ ∃ ∄ ∴ ∵

### Calculus and Analysis Symbols

∫ ∬ ∭ ∮ ∯ ∰ ∇ δ ∂

### Greek Letters

α β Γγ Δδ ε ζ η Θθ ι κ Λλ μ Ξξ Ππ ρ Σσ Ττ υ Φφ χ Ψψ Ωω

# Colored text

To help distinguish important parts of longer answers, we now have colored text (also slightly larger at 125%, may be changed back to 100%) that you can use in your posts! In order to use them, you need to put the text on a new line and everything on that line will be in that color.

### Purple: ###purple

#### Blue: ####blue

##### Green: #####green

###### Red: ######red

**Other resources**

- /r/learnmath
- /r/math
- /r/mathpics
- #math IRC on Snoonet
- Additional resources, compiled by redditors

**Please do NOT delete your posts once they've been solved! Rather, assign them with the "Solved!" Link Flair so others can learn!**

### Learn Math

#### 27,384 subscribers a community for 5 years, 8 months

last post 87 days ago [+]

### [PSA] Set your post to 'Resolved'! | *[PSA] Posts Must Include Specific Title and Description!*

Think /r/math is too advanced?

*Here,* **the only stupid question is the one you don't ask.**

This is a subreddit for learning math, and can be seen as a sister subreddit to /r/math. Post all your math-learning resources here. Questions, no matter how basic, will be answered (to the best ability of the online subscribers).

**Follow reddiquette. Be civil and polite; this is meant to be an approachable community for discussion of reason and logic.**

*To receive the best help, please use the following format:*

## [Level Discipline] Sample topic question

*EX:* [High School Math] Quadratic Equations

*EX:* [University Statistics] Probability

• Include instructor prompts (if any). What does your instructor (or the text) want you to accomplish?

• Tell us what is holding you up. Where are you in the process? Provide those who help with as much information as possible.

• Include any equations or assumptions you are using, and descriptions of any attempts you have made.

# \/r/LearnMath Chatroom

**Join the unofficial IRC channel: #LearnMath on Freenode.** (No client required.)

*Not allowed:*

• "Do this for me" posts.

• Personal information. Check your documents before posting.

• Offers or solicitations of payment in any form.

• Surveys. Take them to /r/samplesize.

• Advertisements of any form.

• Posting of quizzes or lists of questions.

• One-sentence posts. Have some respect for people who take time to answer your question and follow the posting rules.

• Being a jerk. Jerks get banned.

**Using LaTeX**
Type this ((remove the '\' when typing):

```
`[\; e^{\pi i} + 1 = 0 ;]`
```

you will read:
`[; e^{\pi i} + 1 = 0 ;]`

if you used the LaTeX plugins properly.

Firefox: just install the addon

Opera: use native userjs

Chrome: try the extension

Safari: use Greasekit with the script

**Best read with**:

Other resources include:

### math

#### 141,774 subscribers a community for 7 years, 6 months

last post 8 days ago [+]

**Welcome to /r/math**

This subreddit is for discussion of mathematical links and questions. Please read the FAQ before posting.

Homework problems, practice problems, and similar questions should be directed to /r/learnmath, /r/homeworkhelp or /r/cheatatmathhomework, and will be removed.

Image-only posts should be on-topic and should promote discussion; please do not post memes or similar content here. Please be polite and civil when commenting, and always follow reddiquette.

Filters: Hide Image Posts Show All Posts

**Recurring Threads and Resources**

*What Are You Working On?* - posted Mondays

~~*Everything About X* - Posted Wednesdays~~ *(on hold)*

*Simple Questions* - Posted Fridays

~~*/r/math's Book Club* - Posted Fridays~~ *(on hold)*

*A Compilation of Free, Online Math Resources*.

**Using LaTeX**

To view LaTeX on reddit, install *one* of the following:

MathJax Greasemonkey userscript

TeXtheWorld Chrome extension

TeXtheWorld Greasemonkey userscript

`[; e^{\pi i} + 1 = 0 ;]`

Post the equation above like this:

`[*;* e\^{\pi i}+1=0 *;*]`

You may need to add four spaces before or put backticks around math fragments.

**Using Superscripts and Subscripts**

x*_sub_* makes x*sub*

x*`sup`* and x\^(sup) both make x^(sup)

x*_sub_`sup`* makes x*sub*`sup`

x*`sup`_sub_* makes x`sup`

*sub*

**Other Subreddits**

**Math**

- /r/learnmath
- /r/mathbooks
- /r/cheatatmathhomework
- /r/matheducation
- /r/casualmath
- /r/puremathematics
- /r/mathpics
- /r/mathriddles

**Tools**

- /r/mathematica
- /r/matlab
- /r/sagemath

**Related fields**

- /r/actuary
- /r/algorithms
- /r/compsci
- /r/interdisciplinary
- /r/statistics

### Math Pics: What math looks like

#### 11,472 subscribers a community for 4 years, 3 months

last post 3 days ago [+]

**Welcome to Math Pics**

Applications of mathematical principles can be beautiful in their elegance, simplicity, complexity, organization and/or apparent chaos. This is a place for those things.

**For best results**

In the title or comment of your submissions, tell us why the image you are linking to is mathematically significant.

**Other Resources**

### We Love Maths

#### 123 subscribers a community for 3 years, 8 months

last post 497 days ago [+]

all mathematics lovers are welcomed here

You can post math facts, math jokes, math puzzles , etc.

Links

### Numerical computing and methods

#### 1,088 subscribers a community for 5 years, 9 months

last post 38 days ago [+]

For people doing numerical computing. Tools, algorithms and related math.

# Related Subreddits

- /r/octave
- /r/sagemath

keywords: scientific computing, BLAS, gpgpu, fft, wavelets, linear equations, neural netwoks, statistics, physics, monte carlo, optimization, matlab scilab, octave, numpy, R, mathematica, ...

### string theory

#### 1,643 subscribers a community for 5 years, 6 months

last post 105 days ago [+]

This is a reddit for the latest developments/ discussions in string theory. Topics include string/M theories and holography. Discuss the work of famous string theorists (like Witten, Susskind, Maldacena, Vafa). Papers and lectures are especially encouraged. Please keep posts pertinent.

Other reddits you may like are:

### VotingTheory: It's a Game. Learn the Rules.

#### 425 subscribers a community for 5 years, 5 months

last post 9 days ago [+]

Discuss how the way we vote changes who we elect. Post a good link, and take a stand for the system that gives the right results.

- Condorcet methods
- Strategies
- Game Theory

Can't find a good link, but want to ask a question or have a discussion? Head to /r/discussvotingtheory

Also interested in other issues affecting our elections? Head over to /r/electionreform!