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Mathematics
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Fiktor's user avatar
Fiktor's user avatar
Fiktor
  • Member for 14 years, 5 months
  • Last seen more than a month ago
  • St. Petersburg, Russia
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Top posts
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answer
85
Prove that $\prod_{k=1}^{n-1}\sin\frac{k \pi}{n} = \frac{n}{2^{n-1}}$
Oct 30, 2010
question
32
Fundamental group of GL(n,C) is isomorphic to Z. How to learn to prove facts like this?
Aug 30, 2010
question
18
Matrix diagonalization theorems and counterexamples: reference-request.
Feb 19, 2014
question
14
In which commutative algebras does any derivation possess a flow?
Sep 19, 2010
question
11
Upper-triangular matrix is invertible iff its diagonal is invertible: C*-algebra case
Oct 25, 2010
question
7
How to prove the following resummation identity for Erdős–Borwein constant?
Sep 6, 2022
answer
7
Proper Measurable subgroups of $\mathbb R$
Aug 4, 2010
answer
6
Cutting the Cake Problem
Aug 14, 2010
answer
6
How do you show that $d\theta = \frac{x dy - y dx }{x^2 + y^2}$?
Oct 5, 2010
answer
5
Continuous function satisfying $f^{k}(x)=f(x^k)$
Aug 13, 2010
Top network posts
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59
Is there any way to generate custom errors/warnings in LaTeX?
49
How to typeset subscript in usual text mode?
36
How to find a package name by a command name?
31
Should std::sort work with lambda function in c++0x/c++11?
28
How to input int64_t / uint64_t constants?