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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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Deleted answered question / arXiv posts based on unacknowledged MO posts
Jul 8 '18
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What to do with links to arXiv front end?
Apr 18 '20
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Deletion of on-topic comment threads
May 5 '21
18
Welcoming new user: on a recent question about connections
Dec 7 '21
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Any policies around Dead links?
Sep 17 '20
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Noncommutative rings/algebra tags
Jan 20 '19
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Recognizing identifiable users changing user names
Jan 8 '20
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To which extent can one modify another's question?
Oct 3 '21
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Should graduate students be encouraged to participate in MO? If so, at what stage?
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Strange username
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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?
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Are infinite groups in which most elements have order $\leq 2$ commutative?
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Under what conditions is the exponential map on a Lie algebra injective?
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Does GL_n(Z) have a noetherian group ring?

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