### maths and other stories

#### 271 subscribers a community for 9 years, 3 months

last post 2055 days ago [+]

a selection of maths and other humorous creative stories

### For the crummy mathematician.

#### 7,288 subscribers a community for 7 years, 10 months

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

**IRC channel:**

**Discord servers:**

- https://discord.me/math
- https://discord.me/advanced-math

### Math Homework Reddit

#### 17,408 subscribers a community for 8 years, 5 months

last post today [+]

**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
- /r/MathHelp
- #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

#### 61,130 subscribers a community for 8 years, 4 months

last post today [+]

### [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.

MathJax userscript (use with Greasemonkey or Tampermonkey)

Firefox: just install the addon

Opera: use native userjs

Chrome: try the extension

Safari: use Greasekit with the script

**Best read with**:

- Lewisje's list of math resources.
- List of interactive math websites.
- /r/math
- /r/cheatatmathhomework
- /r/academiceconomics

Other resources include:

- Khan Academy
- Alcumus
- CTY Online AP & College Math
- ODE videos on YouTube
- /r/tutor
- Compilation of Free online math resources

### math

#### 429,188 subscribers a community for 10 years, 2 months

last post today [+]

**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. Do not **ask or answer** this type of question in /r/math.

If you're asking for help learning/understanding something mathematical, post in the *Simple Questions* thread or /r/learnmath. **This includes reference requests** - also see our lists of recommended books and free online resources. Here is a more recent thread with book recommendations.

If you are asking for a calculation to be made, please post to /r/askmath or /r/learnmath.

If you are asking for advice on choosing classes or career prospects, please post in the stickied Career & Education Questions thread.

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.

All posts and comments should be directly related to mathematics. **General political debate is not permitted**.

Filters: Hide Image Posts Show All Posts

**Recurring Threads and Resources**

*Everything about X* - every Wednesday

*What Are You Working On?* - posted Mondays, Wednesdays and Fridays

*Career and Education Q&A* - Every other Thursday

*Simple Questions* - Posted Fridays

*A Compilation of Free, Online Math Resources*.

*Click here to chat with us on IRC!*

**Using LaTeX**

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

MathJax userscript (userscripts need Greasemonkey, Tampermonkey or similar)

TeX all the things Chrome extension (configure inline math to use [*;* *;*] delimiters)

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

Post the equation above like this:

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

**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*

**Useful Symbols**

Basic Math Symbols

≠ ± ∓ ÷ × ∙ – √ ‰ ⊗ ⊕ ⊖ ⊘ ⊙ ≤ ≥ ≦ ≧ ≨ ≩ ≺ ≻ ≼ ≽ ⊏ ⊐ ⊑ ⊒ ² ³ °

Geometry Symbols

∠ ∟ ° ≅ ~ ‖ ⟂ ⫛

Algebra Symbols

≡ ≜ ≈ ∝ ∞ ≪ ≫ ⌊⌋ ⌈⌉ ∘∏ ∐ ∑ ⋀ ⋁ ⋂ ⋃ ⨀ ⨁ ⨂ 𝖕 𝖖 𝖗

Set Theory Symbols

∅ ∖ ∁ ↦ ↣ ∩ ∪ ⊆ ⊂ ⊄ ⊊ ⊇ ⊃ ⊅ ⊋ ⊖ ∈ ∉ ∋ ∌ ℕ ℤ ℚ ℝ ℂ ℵ ℶ ℷ ℸ 𝓟

Logic Symbols

¬ ∨ ∧ ⊕ → ← ⇒ ⇐ ↔ ⇔ ∀ ∃ ∄ ∴ ∵ ⊤ ⊥ ⊢ ⊨ ⫤ ⊣

Calculus and Analysis Symbols

∫ ∬ ∭ ∮ ∯ ∰ ∇ ∆ δ ∂ ℱ ℒ ℓ

Greek Letters

## 𝛢𝛼 𝛣𝛽 𝛤𝛾 𝛥𝛿 𝛦𝜀𝜖 𝛧𝜁 𝛨𝜂 𝛩𝜃𝜗 𝛪𝜄 𝛫𝜅 𝛬𝜆 𝛭𝜇 𝛮𝜈 𝛯𝜉 𝛰𝜊 𝛱𝜋 𝛲𝜌 𝛴𝜎 𝛵𝜏 𝛶𝜐 𝛷𝜙𝜑 𝛸𝜒 𝛹𝜓 𝛺𝜔

**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

#### 14,683 subscribers a community for 7 years

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

#### 116 subscribers a community for 6 years, 4 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

#### 1,335 subscribers a community for 8 years, 6 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

#### 1,785 subscribers a community for 8 years, 3 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.

#### 513 subscribers a community for 8 years, 2 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!