Welcome to MathOverflow

Question

73

128

What are really helpful math resources out there on the web?

Please don't only post a link but a short description of what it does and why it is helpful.

Please only one resource per answer and let the votes decide which are the best!

edited Mar 9 2010 at 10:40

vonjd

community wiki

6 revisions, 2 users
vonjd 70%

1

I edited your question a bit, my main goal was to remove the reference to WolframAlpha; and make the text easier to read. But feel free to revert if you like! (You can see the edit history and revert by clicking on "edited ... ago") – Ilya Nikokoshev Nov 4 2009 at 21:23

3

The answers below are great. Here's an idea I don't see that may be interesting to think about starting: An online example repository. This would be a place where one could upload and search various "first nontrivial example" notes. I think such a thing would really move mathematics along. – Jon Bannon Apr 20 2012 at 13:38

anon · Answer 1 · 2010-10-17 22:19:46Z UTC

0

An excellent catalogue of mathematical information available on the web is Keith Mathhews'

http://www.numbertheory.org/ntw/gateways.html

and if you are interested in Number Theory, see

http://www.numbertheory.org/ntw/

answered Oct 17 2010 at 22:19

anon

community wiki

I. J. Kennedy · Answer 2 · 2010-10-27 01:35:55Z UTC

0

http://functions.wolfram.com/

answered Oct 27 2010 at 1:35

I. J. Kennedy

community wiki

1

We have that already - see above – vonjd Oct 27 2010 at 6:27

jjcale · Answer 3 · 2011-11-16 19:39:24Z UTC

0

For people who are interested in prime factorization : www.mersenneforum.org

answered Nov 16 2011 at 19:39

jjcale

community wiki

Yazdegerd III · Answer 4 · 2013-01-03 17:51:07Z UTC

Jahrbuch Database

http://www.emis.de/MATH/JFM/

A sort of Mathscinet and Zentralblatt for the period 1868-1942. Most of the reviews are in German. It is interesting to read the reviews written by mathematicians like Frobenius, Hilbert, Minkowski, Hasse, E. Noether, Artin, Mittag-Leffler, Landau, Van der Waerden, ...

GA316 · Answer 5 · 2013-04-12 14:11:06Z UTC

0

NPTEL provides E-learning through online Web and Video courses in Mathematics organized by Indian Institute of Technology. http://nptel.iitm.ac.in/

answered Apr 12 at 14:11

GA316

community wiki

nonlinearism · Answer 6 · 2013-04-12 15:40:56Z UTC

0

www.proofwiki.org

It is a wikipedia, for proofs.

answered Apr 12 at 15:40

nonlinearism

community wiki

Most helpful math resources on the web

Remember to vote up questions/answers you find interesting or helpful (requires 15 reputation points)

66 Answers

You can accept an answer to one of your own questions by clicking the check mark next to it. This awards 15 reputation points to the person who answered and 2 reputation points to you.