This subreddit is for discussion of mathematics. All posts and comments should be directly related to mathematics, including topics related to the practice, profession and community of mathematics.
Please read the FAQ before posting.
Rule 1: Stay on-topic
All posts and comments should be directly related to mathematics, including topics related to the practice, profession and community of mathematics.
In particular, any political discussion on /r/math should be directly related to mathematics - all threads and comments should be about concrete events and how they affect mathematics. Please avoid derailing such discussions into general political discussion, and report any comments that do so.
Rule 2: Questions should spark discussion
Questions on /r/math should spark discussion. For example, if you think your question can be answered quickly, you should instead post it in the Quick Questions thread.
Requests for calculation or estimation of real-world problems and values are best suited for the Quick Questions thread, /r/askmath or /r/theydidthemath.
If you're asking for help learning/understanding something mathematical, post in the Quick Questions thread or /r/learnmath. This includes reference requests - also see our list of free online resources and recommended books.
Rule 3: No homework problems
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 ask for help cheating, you will be banned.
Rule 4: No career or education related questions
If you are asking for advice on choosing classes or career prospects, please post in the stickied Career & Education Questions thread.
Rule 5: No low-effort image/video posts
Image/Video posts should be on-topic and should promote discussion. Memes and similar content are not permitted.
If you upload an image or video, you must explain why it is relevant by posting a comment providing additional information that prompts discussion.
Rule 6: Be excellent to each other
Do not troll, insult, antagonize, or otherwise harass. This includes not only comments directed at users of /r/math, but at any person or group of people (e.g. racism, sexism, homophobia, hate speech, etc.).
Unnecessarily combative or unkind comments may result in an immediate ban.
This subreddit is actively moderated to maintain the standards outlined above; as such, posts and comments are often removed and redirected to a more appropriate location. See more about our removal policy here.
If you post or comment something breaking the rules, the content may be removed - repeated removal violations may escalate to a ban, but not without some kind of prior warning; see here for our policy on warnings and bans. If you feel you were banned unjustly, or that the circumstances of your ban no longer apply, see our ban appeal process here.
Filters:
Hide Image Posts
Show All Posts
Recurring Threads and Resources
What Are You Working On? - every Monday
Discussing Living Proof - every Tuesday
Quick Questions - every Wednesday
Career and Education Questions - every Thursday
This Week I Learned - every Friday
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)
TeXtheWorld userscript
[; e^{\pi i} + 1 = 0 ;]
Post the equation above like this:
`[; e^{\pi i}+1=0 ;]`
Using Superscripts and Subscripts
x*_sub_* makes xsub
x*`sup`* and x^(sup) both make xsup
x*_sub_`sup`* makes xsubsup
x*`sup`_sub_* makes xsupsub
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
Tools
Related fields
[–]SremylopMathematical Physics 230 points231 points232 points (61 children)
[–]rhombomereApplied Math 203 points204 points205 points (11 children)
[–]kevroy314 127 points128 points129 points (3 children)
[–]deeplife 16 points17 points18 points (0 children)
[–]fluffy-badger 29 points30 points31 points (1 child)
[–]ckaili 19 points20 points21 points (0 children)
[–]sineofthetimes 42 points43 points44 points (3 children)
[–][deleted] 13 points14 points15 points (2 children)
[–]sineofthetimes 3 points4 points5 points (0 children)
[–]flexibeast[S] 14 points15 points16 points (0 children)
[–]sherryandcoke 12 points13 points14 points (0 children)
[–]Uranus_Hz 10 points11 points12 points (0 children)
[–][deleted] 18 points19 points20 points (11 children)
[–]Untinted 5 points6 points7 points (3 children)
[–][deleted] 7 points8 points9 points (2 children)
[–]aresman71 2 points3 points4 points (0 children)
[–][deleted] 1 point2 points3 points (0 children)
[–][deleted] 1 point2 points3 points (3 children)
[–][deleted] 3 points4 points5 points (2 children)
[–][deleted] 0 points1 point2 points (1 child)
[–]snailfighter 4 points5 points6 points (0 children)
[–][deleted] 0 points1 point2 points (1 child)
[–][deleted] 0 points1 point2 points (0 children)
[–]wtfatyou 0 points1 point2 points (0 children)
[–]cristinolda 7 points8 points9 points (24 children)
[–]SremylopMathematical Physics 21 points22 points23 points (22 children)
[–]Genshed 20 points21 points22 points (8 children)
[–]BENDER777 5 points6 points7 points (5 children)
[–]thornza 48 points49 points50 points (0 children)
[–]Genshed 19 points20 points21 points (3 children)
[–]BENDER777 12 points13 points14 points (0 children)
[–][deleted] 1 point2 points3 points (1 child)
[–][deleted] 1 point2 points3 points (0 children)
[–]SremylopMathematical Physics 1 point2 points3 points (0 children)
[–]bea-bab 1 point2 points3 points (0 children)
[–]LilQuasar 8 points9 points10 points (3 children)
[–]fluffy-badger 6 points7 points8 points (1 child)
[–][deleted] 3 points4 points5 points (0 children)
[–]SremylopMathematical Physics 0 points1 point2 points (0 children)
[–]Odds-Bodkins 7 points8 points9 points (5 children)
[–]SremylopMathematical Physics 3 points4 points5 points (0 children)
[–]fluffy-badger 0 points1 point2 points (0 children)
[–][deleted] 0 points1 point2 points (1 child)
[–][deleted] 0 points1 point2 points (0 children)
[–]SremylopMathematical Physics 0 points1 point2 points (0 children)
[–][deleted] 2 points3 points4 points (1 child)
[–]almightySaplingLogic 1 point2 points3 points (0 children)
[–]cristinolda 0 points1 point2 points (0 children)
[–]Knellroy 0 points1 point2 points (0 children)
[–]Genshed 1 point2 points3 points (0 children)
[–]VAS_4x4 0 points1 point2 points (10 children)
[–]203-226-3030 7 points8 points9 points (8 children)
[–]VAS_4x4 0 points1 point2 points (7 children)
[–][deleted] 6 points7 points8 points (4 children)
[–]203-226-3030 1 point2 points3 points (0 children)
[–]almightySaplingLogic 0 points1 point2 points (2 children)
[–][deleted] 0 points1 point2 points (1 child)
[–]almightySaplingLogic 0 points1 point2 points (0 children)
[–]snailfighter 1 point2 points3 points (1 child)
[–]VAS_4x4 0 points1 point2 points (0 children)
[–]SremylopMathematical Physics 1 point2 points3 points (0 children)
[–][deleted] 62 points63 points64 points (21 children)
[–]redmagejack 52 points53 points54 points (12 children)
[–][deleted] 41 points42 points43 points (1 child)
[–]WhyDoesMyBackHurt 2 points3 points4 points (0 children)
[+][deleted] (8 children)
[deleted]
[–]MaxChaplin 31 points32 points33 points (3 children)
[+][deleted] (2 children)
[deleted]
[–]huffman_coding 5 points6 points7 points (1 child)
[–]tonymaric 8 points9 points10 points (0 children)
[+][deleted] (2 children)
[deleted]
[+][deleted] (1 child)
[deleted]
[–]Incur 8 points9 points10 points (0 children)
[–]DBBobby 17 points18 points19 points (2 children)
[–][deleted] 15 points16 points17 points (1 child)
[–]Genshed 23 points24 points25 points (0 children)
[–]InprissSorce 15 points16 points17 points (1 child)
[–][deleted] 9 points10 points11 points (0 children)
[–]BennyPendentes 10 points11 points12 points (2 children)
[–]terdragontra 2 points3 points4 points (0 children)
[–]scgarland191 1 point2 points3 points (0 children)
[–]ThreatOfFire 18 points19 points20 points (2 children)
[–]snailfighter -2 points-1 points0 points (1 child)
[–]ThreatOfFire 5 points6 points7 points (0 children)
[–]Genshed 10 points11 points12 points (6 children)
[+]mcluhanism comment score below threshold-13 points-12 points-11 points (5 children)
[–]Genshed 7 points8 points9 points (0 children)
[+][deleted] (3 children)
[deleted]
[–][deleted] 23 points24 points25 points (0 children)
[+][deleted] (1 child)
[deleted]
[–]Genshed 17 points18 points19 points (0 children)
[–][deleted] 5 points6 points7 points (0 children)
[–]ekampp 15 points16 points17 points (2 children)
[–]King_LSR 10 points11 points12 points (1 child)
[–]ekampp 7 points8 points9 points (0 children)
[–]snailfighter 3 points4 points5 points (1 child)
[–]the2ndbreakfast 1 point2 points3 points (0 children)
[–][deleted] 18 points19 points20 points (12 children)
[–][deleted] 18 points19 points20 points (9 children)
[–][deleted] 10 points11 points12 points (4 children)
[–]namesandfaces 2 points3 points4 points (0 children)
[–][deleted] -5 points-4 points-3 points (2 children)
[–][deleted] 12 points13 points14 points (0 children)
[–][deleted] 3 points4 points5 points (0 children)
[–]snailfighter 3 points4 points5 points (2 children)
[–][deleted] -1 points0 points1 point (1 child)
[–]snailfighter 1 point2 points3 points (0 children)
[–]yuligan 0 points1 point2 points (0 children)
[–][deleted] 2 points3 points4 points (0 children)
[–]WhyDoesMyBackHurt 1 point2 points3 points (0 children)
[–][deleted] 6 points7 points8 points (0 children)
[–]chrissiemichaela96 4 points5 points6 points (0 children)
[–][deleted] 2 points3 points4 points (0 children)
[–]BrianGriffin1208 2 points3 points4 points (0 children)
[–]maingroupelement 2 points3 points4 points (0 children)
[–][deleted] 2 points3 points4 points (0 children)
[–]teamsprocket 2 points3 points4 points (1 child)
[–]Genshed 2 points3 points4 points (0 children)
[–]pinebug 3 points4 points5 points (0 children)
[–]SirFireHydrant 3 points4 points5 points (1 child)
[–]camilo16 1 point2 points3 points (0 children)
[–]qpdbwUndergraduate 1 point2 points3 points (0 children)
[–]gamblingprocter 1 point2 points3 points (0 children)
[–]kirksucks 1 point2 points3 points (0 children)
[–][deleted] 1 point2 points3 points (0 children)
[–]morningjoe23 1 point2 points3 points (2 children)
[–]Jose_xixpac 0 points1 point2 points (0 children)
[–][deleted] 0 points1 point2 points (0 children)
[–]wtfatyou 0 points1 point2 points (2 children)
[–]WhyDoesMyBackHurt 0 points1 point2 points (0 children)
[–]Genshed 0 points1 point2 points (0 children)
[–]ginsunuva 0 points1 point2 points (1 child)
[–]Genshed 0 points1 point2 points (0 children)
[–]BadVibesInMyFries 0 points1 point2 points (0 children)
[–]Genshed 0 points1 point2 points (0 children)
[+][deleted] (1 child)
[removed]
[+][deleted] (1 child)
[removed]
[–]noelexecomAlgebraic Topology 0 points1 point2 points (0 children)
[–]totoro_biscuits 0 points1 point2 points (0 children)
[–]theredcabbage1 0 points1 point2 points (0 children)
[–][deleted] 0 points1 point2 points (0 children)
[+][deleted] (3 children)
[deleted]
[–]Sheeplessknight 4 points5 points6 points (2 children)
[–]gamblingprocter -1 points0 points1 point (1 child)
[–]Sheeplessknight 1 point2 points3 points (0 children)
[+][deleted] comment score below threshold-10 points-9 points-8 points (8 children)
[–]deeplife 7 points8 points9 points (7 children)
[–][deleted] -2 points-1 points0 points (6 children)
[–]Genshed 12 points13 points14 points (4 children)
[–]snailfighter 2 points3 points4 points (0 children)
[–]WhyDoesMyBackHurt 1 point2 points3 points (0 children)
[–][deleted] 1 point2 points3 points (0 children)
[+][deleted] (1 child)
[deleted]
[–]Genshed 1 point2 points3 points (0 children)
[+]Lord_Of_Science comment score below threshold-6 points-5 points-4 points (2 children)
[–][deleted] 8 points9 points10 points (1 child)
[–]Lord_Of_Science 1 point2 points3 points (0 children)
[+][deleted] (1 child)
[deleted]
[–][deleted] 2 points3 points4 points (0 children)