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.
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Subcategories 7
Related categories 1
Sites 5
In various subjects, compiled by Torsten Sillke.
Elementary unsolved problems in mathematics, listed at the MathPages archive.
A collection of unsolved math problems anyone can contribute to.
A list of unsolved problems published by MathPro Press during 1995.
A list compiled by Eric Weisstein in MathWorld.
A list compiled by Eric Weisstein in MathWorld.
A collection of unsolved math problems anyone can contribute to.
A list of unsolved problems published by MathPro Press during 1995.
In various subjects, compiled by Torsten Sillke.
Elementary unsolved problems in mathematics, listed at the MathPages archive.
Other languages 1
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