Additional
Information: Sites referring to open problems in mathematical research. Those referring to a specific area should be submitted to that category: there is also a recereational category.
Mathematical Problems Mathematical Problems: In various subjects, compiled by Torsten Sillke. (Open Problems) http://www.mathematik.uni-bielefeld.de/~sillke/problems.html
Some Unsolved Problems with Elementary Formulation Some Unsolved Problems with Elementary Formulation: Statements of some famous problems compiled by Frank Wikstrom, Ume� University. (Open Problems) http://abel.math.umu.se/~frankw/unsolved.html
Unsolved Problem of the Week Archive Unsolved Problem of the Week Archive: A list of unsolved problems published by MathPro Press during 1995. (Open Problems) http://cage.rug.ac.be/~hvernaev/problems/archive.html
Millennium Prize Problems Millennium Prize Problems: The seven problems proposed by the Clay Mathematics Institute: P versus NP; Hodge Conjecture; Poincaré Conjecture; Riemann Hypothesis; Yang-Mills Existence and Mass Gap; Navier-Stokes Existence and Smoothness; Birch and Swinnerton-Dyer Conjecture. Reso (Open Problems) http://www.claymath.org/millennium/
Unsolved Mathematics Problems Unsolved Mathematics Problems: Compiled by Steven Finch. Descriptions of some unsolved problems and numerous links to other collections. (Open Problems) http://www.mathsoft.com/mathresources/problems/
Most Wanted List Most Wanted List: Elementary unsolved problems in mathematics, listed at the MathPages archive. (Open Problems) http://mathpages.com/home/mwlist.htm
Additional
Information: Sites referring to open problems in mathematical research. Those referring to a specific area should be submitted to that category: there is also a recereational category.
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