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A nomadic postdoc, currently in Australia.

May
23
awarded  Popular Question
May
13
revised Continuity of conjugation actions of Polish groups
added 335 characters in body; added 7 characters in body
May
13
answered Continuity of conjugation actions of Polish groups
May
12
comment Continuity of conjugation actions of Polish groups
Yes, the topology of $G$ can in general be finer than that of $\psi(G)$.
May
12
revised Continuity of conjugation actions of Polish groups
added 73 characters in body
May
12
reviewed Approve Random graphs with boundary in a game (Tsuro)
May
12
asked Continuity of conjugation actions of Polish groups
May
5
awarded  Nice Answer
Apr
22
comment When is it appropriate to name something a 'fundamental lemma'?
Another option is to attach the name of the original authors to the lemma, so it becomes 'X's Lemma' rather than 'Lemma 5.63'. It depends if the use of the lemma was pioneered by a specific set of authors, or if it is of uncertain 'folklore' origin and/or has been repeatedly rediscovered by different authors (the latter is a good sign of a 'fundamental' lemma).
Apr
13
asked Topological systems of imprimitivity
Apr
2
comment Should one post a paper on the arXiv if it is not intended to be published?
The novelty threshold for putting something on the arXiv is lower than for a typical journal article. For instance, I would not be surprised to see notes from a postgrad-level study group up there, if the topic was something that has not yet been standardised into textbook form. If it's something that could be useful to research-level mathematicians, then go ahead.
Feb
17
awarded  Yearling
Dec
22
comment Powers in compact coset spaces
Good point about sequential compactness. It looks like a net would work for the $\mathbb{T}^{\mathbb{T}}$ example.
Dec
22
comment Powers in compact coset spaces
If $G$ is t.d.l.c. and $K$ is normal, it reduces to the profinite case, which is indeed easy. I'm wondering what happens if $K$ is not normal.
Dec
22
revised Powers in compact coset spaces
added 15 characters in body
Dec
22
comment Powers in compact coset spaces
Ah yes, I see the issue there if $G$ is not metrisable. Yes, a net is fine.
Dec
22
asked Powers in compact coset spaces
Dec
17
awarded  Good Question
Dec
16
comment What is the universal property of quotienting a normaliser of the subgroup?
In the context of $G$-sets, 'conjugacy class of subgroups' is perhaps a more natural notion than 'subgroup', since conjugacy classes of subgroups naturally correspond to transitive $G$-sets.
Dec
15
comment Why do sporadic simple groups have so few conjugacy classes?
That is interesting. I wonder how much of this is coming from the Weyl group and how much from the Borel subgroup.