1. Tour
  2. About Us
  3. Meta
Loading…
  1. Log in
  2. current community

    • Stack Exchange
      chat
    • Meta Stack Exchange

    your communities

    Sign up or log in to customize your list.

    more stack exchange communities

    company blog

By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service.

Stack Exchange

  • All Sites
  • Top Users
  • Digests

sperners lemma

every number is two squares and a cube

top accounts reputation activity favorites subscriptions
Top Questions
28 votes

When is $1^5 + 2^5 + \ldots + n^5$ a square?

diophantine-equations asked Oct 19 '12 at 18:10
math.stackexchange.com

20 votes

Fourier transform of fourier transform?

real-analysis integration fourier-analysis asked Nov 20 '12 at 18:02
math.stackexchange.com

15 votes

Why is this certificate valid for so many domains?

certificates asked Oct 23 '12 at 17:35
security.stackexchange.com

11 votes

Leading Digit of $2^{4242}$

elementary-number-theory asked Nov 15 '12 at 14:35
math.stackexchange.com

6 votes

Could this solve SQL injection and XSS vulnerabilities?

web-application asked Oct 25 '12 at 15:45
security.stackexchange.com

5 votes

For which $(n,m,l)$ does $L_n^2+L_m^2=L_l^2$ hold?

number-theory algebraic-number-theory diophantine-equations asked Nov 12 '12 at 13:31
math.stackexchange.com


Top Answers
11
Maybe Things Can be Divided by Zero
math.stackexchange.com

11
Show that $121^{n}-25^{n}+1900^{n}-(-4)^{n}$ is divisible by 2000.
math.stackexchange.com

9
Proving Functions are Surjective
math.stackexchange.com

8
How do I get the integer part of a number by using basic arithmetic?
math.stackexchange.com

7
How many sequences of consecutive integers are there where the sum equals the length
math.stackexchange.com

7
How to find the roots of $x³-2$?
math.stackexchange.com

7
Why the following G.C.D is $1$
math.stackexchange.com

6
Opposite category functor
math.stackexchange.com

5
Coproducts exist in the category of groups
math.stackexchange.com

5
Prove the LCM (Least Common Multiple).
math.stackexchange.com

5
If $(a, b, c)$ is a Pythagorean triple, then $(a+1, b+1, c+1)$ is not a Pythagorean triple.
math.stackexchange.com


Stack Exchange
  • About
  • Contact
  • Feedback
Company
  • Stack Overflow
  • Stack Overflow Business
  • Developer Jobs
  • Press
  • Legal
  • Privacy Policy
Stack Exchange
Network
  • Technology
  • Life / Arts
  • Culture / Recreation
  • Science
  • Other
  • Stack Overflow
  • Server Fault
  • Super User
  • Web Applications
  • Ask Ubuntu
  • Webmasters
  • Game Development
  • TeX - LaTeX
  • Software Engineering
  • Unix & Linux
  • Ask Different (Apple)
  • WordPress Development
  • Geographic Information Systems
  • Electrical Engineering
  • Android Enthusiasts
  • Information Security
  • Database Administrators
  • Drupal Answers
  • SharePoint
  • User Experience
  • Mathematica
  • Salesforce
  • ExpressionEngine® Answers
  • Stack Overflow em Português
  • Blender
  • Network Engineering
  • Cryptography
  • Code Review
  • Magento
  • Software Recommendations
  • Signal Processing
  • Emacs
  • Raspberry Pi
  • Stack Overflow на русском
  • Code Golf
  • Stack Overflow en español
  • Ethereum
  • Data Science
  • Arduino
  • Bitcoin
  • Software Quality Assurance & Testing
  • Sound Design
  • Windows Phone
  • more (27)
  • Photography
  • Science Fiction & Fantasy
  • Graphic Design
  • Movies & TV
  • Music: Practice & Theory
  • Worldbuilding
  • Video Production
  • Seasoned Advice (cooking)
  • Home Improvement
  • Personal Finance & Money
  • Academia
  • Law
  • Physical Fitness
  • Gardening & Landscaping
  • Parenting
  • more (11)
  • English Language & Usage
  • Skeptics
  • Mi Yodeya (Judaism)
  • Travel
  • Christianity
  • English Language Learners
  • Japanese Language
  • Chinese Language
  • French Language
  • German Language
  • Biblical Hermeneutics
  • History
  • Spanish Language
  • Islam
  • Русский язык
  • Russian Language
  • Arqade (gaming)
  • Bicycles
  • Role-playing Games
  • Anime & Manga
  • Puzzling
  • Motor Vehicle Maintenance & Repair
  • Board & Card Games
  • Bricks
  • Homebrewing
  • Martial Arts
  • The Great Outdoors
  • Poker
  • Chess
  • Sports
  • more (16)
  • MathOverflow
  • Mathematics
  • Cross Validated (stats)
  • Theoretical Computer Science
  • Physics
  • Chemistry
  • Biology
  • Computer Science
  • Philosophy
  • Linguistics
  • Psychology & Neuroscience
  • Computational Science
  • more (8)
  • Meta Stack Exchange
  • Stack Apps
  • API
  • Data
  • Blog
  • Facebook
  • Twitter
  • LinkedIn

site design / logo © 2019 Stack Exchange Inc; user contributions licensed under cc by-sa 4.0 with attribution required. rev 2019.12.13.35637