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Mathematics
Fernando Martin's user avatar
Fernando Martin's user avatar
Fernando Martin's user avatar
Fernando Martin
  • Member for 13 years, 11 months
  • Last seen more than a month ago
  • Buenos Aires, CABA, Argentina
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188
Proving the identity $\sum_{k=1}^n {k^3} = \big(\sum_{k=1}^n k\big)^2$ without induction
Sep 2, 2011
58
Prove that if $(ab)^i = a^ib^i \forall a,b\in G$ for three consecutive integers $i$ then $G$ is abelian.
May 24, 2011
48
Proving that the set of limit points of a set is closed
Dec 28, 2010
32
Is there a constructive way to exhibit a basis for $\mathbb{R}^\mathbb{N}$?
Mar 20, 2012
29
Zero probability and impossibility
May 24, 2011
22
Counting the number of paths on a graph
Dec 18, 2011
21
Mathematical suggestions for a long commute
Oct 27, 2011
20
Basic categories cheat sheet
May 11, 2013
15
Motivation for adjoint operators in finite dimensional inner-product-spaces
Jul 8, 2012
11
Examples of results failing in higher dimensions
Jun 29, 2011