Problemania

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A moderator at Wiki site http://problemania.org where a group of enthusiasts enjoying sharing the fun solving mathematics, physics, and computing problems. We primarily work on problems found in college/grad school text books.

Web page: http://problemania.org

Twitter: http://twitter.com/#!/problemania

Github: https://github.com/Problemaniac


15 Actions

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Apr
6
 comment The last few digits of $0^0$ are $\ldots0000000001$ (according to WolframAlpha).
Could you give some reference on "$0^0$ is the number of functions from the empty set to the empty set"? I'm not familiar with this. Thanks!
Jan
26
 asked What is the mathematics of UML?
Jan
25
 accepted What algebraic structure is the set of natural numbers and addition?
Jan
23
 comment What algebraic structure is the set of natural numbers and addition?
Could someone recommend a listing of abstract algebraic structures with its features and examples? I have the feeling someone must have tabulated that.
Jan
23
 comment What algebraic structure is the set of natural numbers and addition?
What if 0 is excluded?
Jan
23
 asked What algebraic structure is the set of natural numbers and addition?
Dec
15
 awarded  Supporter
Dec
15
 revised How random is the digits of $\pi$?
added 6 characters in body
Dec
15
 awarded  Editor
Dec
15
 revised How random is the digits of $\pi$?
added 221 characters in body
Dec
15
 asked How random is the digits of $\pi$?
Aug
18
 awarded  Scholar
Aug
18
 accepted What's the analogue of Sierpinski triangle to disk?
Jul
25
 awarded  Student
Jul
25
 asked What's the analogue of Sierpinski triangle to disk?