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YCor
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Selected answers:

Centralizers of pairs in monoids of self-maps

When do two non-degenerate quadratic forms give rise to isomorphic Lie algebras?

A question about subsets of plane (or: how to apply the notion of commensurating action to a plane geometry question);

Finitely generated soluble groups with uncountably many maximal subgroups

Example of reflective subcategory of (Groups) whose reflector doesn't preserve finite products

divisors of $p^4+1$ of the form $kp+1$

Infinitely many finitely generated groups having the same Cayley graph

Do constructible sets have Krull dimension?

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56
Deleted answered question / arXiv posts based on unacknowledged MO posts
Jul 8 '18
30
What to do with links to arXiv front end?
Apr 18 '20
19
Deletion of on-topic comment threads
May 5
17
Noncommutative rings/algebra tags
Jan 20 '19
17
Any policies around Dead links?
Sep 17 '20
16
Recognizing identifiable users changing user names
Jan 8 '20
13
To which extent can one modify another's question?
Oct 3
13
Should graduate students be encouraged to participate in MO? If so, at what stage?
Sep 6 '20
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Strange username
May 5 '20
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On convexity tags
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64
In a topological space if there exists a loop that cannot be contracted to a point does there exist a simple loop that cannot be contracted also?
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How can a mathematician handle the pressure to discover something new?
38
Are infinite groups in which most elements have order $\leq 2$ commutative?
35
Does GL_n(Z) have a noetherian group ring?
35
divisors of $p^4+1$ of the form $kp+1$
34
Under what conditions is the exponential map on a Lie algebra injective?
32
Bourbaki's definition of the number 1

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