Home > Science > Math > Research > Open Problems
Sites referring to open problems in mathematical research. Those referring to a specific area should be submitted to that category: there is also a recreational category.
http://www.mathematik.uni-bielefeld.de/~sillke/problems.html
In various subjects, compiled by Torsten Sillke.
http://mathpages.com/home/mwlist.htm
Elementary unsolved problems in mathematics, listed at the MathPages archive.
http://www.openproblemgarden.org/
A collection of unsolved math problems anyone can contribute to.
http://cage.ugent.be/~hvernaev/problems/archive.html
A list of unsolved problems published by MathPro Press during 1995.
http://mathworld.wolfram.com/UnsolvedProblems.html
A list compiled by Eric Weisstein in MathWorld.
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