List questions from topological-groups

Published on 30 Nov 2016 - 22:03

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Help understanding proof of every topological group is regular

Published on 26 Mar 2026 - 9:35

440

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Closure of identity element in a topological group is the intersection of its neighborhood system

Published on 02 Dec 2016 - 3:20

140

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Prove that $M_{n}(R)$ is a profinite ring and that $GL_{n}(R)$ is a profinite group.

Published on 25 Mar 2026 - 17:40

376

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Is any homomorphism $\Bbb R\to\mathrm U(1)$ an exponential?

Published on 09 Dec 2016 - 4:57

288

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Are closed subgroups of positive measure open?

Published on 12 Dec 2016 - 13:55

292

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Dual groups in Fourier analysis

Published on 12 Dec 2016 - 17:22

1.2k

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Galois group is a profinite group

Published on 25 Mar 2026 - 17:43

964

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Compact subgroup of $SL(2,\mathbb{R})$

Published on 23 Dec 2016 - 14:13

290

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Topology on ring of endomorphisms

Published on 04 Jan 2017 - 10:54

250

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Show that $H^G(X\times Y)\cong H^G(X)\times H^G(Y)$

Published on 04 Jan 2017 - 13:40

402

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Is "$ax+b$" group amenable?

Published on 06 Jan 2017 - 19:05

137

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Compact but non-bounded space?

Published on 10 Jan 2017 - 17:05

135

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Is this continuous bijection a homeomorphism?

Published on 13 Jan 2017 - 10:49

50

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Measure on space of orbits of $N$ under conjugation by $H$

Published on 26 Mar 2026 - 17:34

List Question

If $G$ is a topological/algebraic group, is there a purely group-theoretic interpretation of $G^0$?

Help understanding proof of every topological group is regular

Closure of identity element in a topological group is the intersection of its neighborhood system

Prove that $M_{n}(R)$ is a profinite ring and that $GL_{n}(R)$ is a profinite group.

Is any homomorphism $\Bbb R\to\mathrm U(1)$ an exponential?

Are closed subgroups of positive measure open?

Dual groups in Fourier analysis

Galois group is a profinite group

Compact subgroup of $SL(2,\mathbb{R})$

Topology on ring of endomorphisms

Show that $H^G(X\times Y)\cong H^G(X)\times H^G(Y)$

Is "$ax+b$" group amenable?

Compact but non-bounded space?

Is this continuous bijection a homeomorphism?

Measure on space of orbits of $N$ under conjugation by $H$

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