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Ben Blum-Smith's user avatar
Ben Blum-Smith's user avatar
Ben Blum-Smith
  • Member for 13 years
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105
In categorical terms, why is there no canonical isomorphism from a finite dimensional vector space to its dual?
Dec 30, 2013
59
Original works of great mathematician Évariste Galois
Jan 12, 2012
49
Submodule of free module over a p.i.d. is free even when the module is not finitely generated?
Jun 25, 2012
44
Why is the cartesian product so categorically robust?
May 29, 2015
41
A function that is $L^p$ for all $p$ but is not $L^\infty$?
Dec 12, 2011
39
Is There a Natural Way to Extend Repeated Exponentiation Beyond Integers?
Aug 10, 2011
32
Tricky contour integral resulting from the integration of $\sin ax / (x^2+b^2)$ over the positive halfline
Oct 1, 2011
31
Algebraic closure for $\mathbb{Q}$ or $\mathbb{F}_p$ without Choice?
Feb 29, 2012
25
When is a polynomial contained in the ideal generated by its partial derivatives?
Mar 16, 2016
25
Tate's Thesis: in what sense is Tate's Theorem 4.2.1 the Riemann-Roch theorem for curves?
Oct 7, 2013
Top Meta posts
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23
Is either Math.SE or StackOverflow an appropriate forum for questions about Magma?
14
Asking about wrong answer
6
Partially-unresolved questions with substantial progress: should I post a very long question, or a question + answer?
5
What do you really like about working with/contributing to math-SE?
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28
Is there any proof of the fundamental theorem of algebra that can be introduced to undergraduates who have just completed Calc III?
25
How can I estimate the length of an exam?
21
Direct combinatorial proof that $2^{2k} = \sum \binom{2i}{i}\binom{2j}{j}$?
21
Using a known result without a specific reference
17
When can a finite subgroup of $GL(2n,\mathbb{R})$ be viewed as a subgroup of $GL(n,\mathbb{C})$?