Mathematics
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  • Member for 3 years, 8 months
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All Questions Answers
Score Newest
answer
8
How many irrationals are there which are unique upto addition with rationals?
Sep 2, 2020
question
6
Conditions (allegedly..) sufficient on a nonabelian finite group -- involving the number of conjugacy classes -- for the centre to be nontrivial
Aug 25, 2020
answer
6
A generating set of cardinality $n$ in the free group $F_n$ is a free basis.
Mar 30, 2019
answer
6
How to prove solutions of $2(2^x- 1) x^2 + (2^{x^2}-2)x = 2^{x+1} -2$?
Apr 18, 2021
answer
5
Properties of a certain prime number.
Jan 18, 2020
answer
5
If $x+y+z=xyz$, prove $\frac{2x}{1-x^2}+\frac{2y}{1-y^2}+\frac{2z}{1-z^2}=\frac{2x}{1-x^2}\times\frac{2y}{1-y^2}\times\frac{2z}{1-z^2}$
Sep 29, 2020
answer
4
How do I show $\sup(\bigcup_{n=0}^{\infty} A_n) \leqslant \sum_{n=0}^\infty \sup(A_n)$?
Oct 11, 2020
answer
4
Proving $\sum_{k=1}^{n} \prod_{1 \leq i \leq n, i \neq k} \cot(a_k-a_i) = \sin \frac{n \pi}{2}$
Oct 17, 2020
answer
4
Subspace topology and product topology
Dec 7, 2018
answer
4
Prove: If $p$ is a prime number (but 2) and $2^m \not \equiv 1\bmod p$,$\quad\sum_{k=1}^{p-1} k^m \equiv 0\bmod p$
Dec 19, 2019

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