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czech-spanier
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Phi beta kappa $'89 $ UC Berkeley

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10
Is $\ \{ \sin(p):\ p\ $ is prime $ \}\ $ a dense subset of $\ [-1,1]\ ?$
Feb 11, 2023
answer
8
Find an average number by using group action
Dec 17, 2022
question
7
Is there a perfect group in which not every element is a commutator?
Feb 19
answer
7
What is a good math joke?
Jun 4
answer
6
Is there a vector space whose additive identity is not in the form of $(0,\ldots,0)$?
Aug 15, 2022
answer
6
Can two non-isomorphic finitely presented groups have isomorphic abelianizations?
Oct 18, 2022
answer
5
Let $G$ be a group with $25$ elements and $E$ a $G$-set with $32$ elements. Show that there exists $a \in E$ such that $G_a=G$.
Aug 12, 2022
answer
5
G has a element of order 2 not lying in center
Apr 11
answer
5
find the number of subspaces $W$ such that $U\subseteq W$
Jul 20, 2022
answer
5
Question about discrete topology of $\mathbb{R}$
Sep 17, 2022
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A question on Euler's totient function
6
Noteworthy, but not so famous conjectures resolved recent years
5
Length of a product of conjugates of an element in a free group