User Benjamin Steinberg

18 votes

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How many finitely-generated-by-elements-of-finite-order-groups are there?

answered Apr 16, 2021 at 1:31

18 votes

Accepted

Number of solutions to equations in finite groups

answered Feb 24, 2015 at 3:32

17 votes

Tweetable Mathematics

answered Apr 26, 2017 at 13:21

17 votes

Are unitarily equivalent permutation matrices permutation similar?

answered Dec 10, 2019 at 14:55

17 votes

Modern developments in finite-dimensional linear algebra

answered Feb 27, 2013 at 21:53

16 votes

Why all irreducible representations of compact groups are finite-dimensional ? [EDIT: Subtleties: AC,etc]

answered Jan 20, 2013 at 21:24

16 votes

Was lattice theory central to mid-20th century mathematics?

answered Dec 5, 2013 at 1:11

16 votes

What information is lost in $X \to \mathrm{Sh}(X)$?

answered Jun 3, 2014 at 12:51

16 votes

Example of a group which has $\text{SL}_{n}(\mathbb{Z})$ as the automorphism group

answered Sep 10, 2011 at 19:19

16 votes

Does every irreducible representation of a finite group G embed into its group algebra?

answered Aug 13, 2011 at 22:34

16 votes

What are applications of commutativity theorems for rings?

answered May 27, 2015 at 20:00

15 votes

Monoids of endomorphisms of nonisomorphic groups

answered Nov 12, 2019 at 22:10

15 votes

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Generalized cancelation properties ensuring a monoid embeds into a group

answered Dec 7, 2020 at 15:38

15 votes

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A proof for a statement about polynomial automorphism

answered Jul 26, 2011 at 0:10

15 votes

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Maximal number of maximal subgroups

answered Aug 15, 2012 at 13:04

15 votes

Counterexamples in universal algebra

answered Jan 9, 2014 at 3:19

15 votes

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Do there exist non-isomorphic groups with the same cohomology?

answered Nov 6, 2013 at 15:16

15 votes

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General recipe for building C*-algebras out of combinatorial object

answered Jan 30, 2013 at 18:23

15 votes

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Are there "unsociable" irreps? (Definition inside)

answered Aug 14, 2012 at 11:54

15 votes

An example of a proof that is explanatory but not beautiful? (or vice versa)

answered Jul 24, 2013 at 13:30

14 votes

What are some deep theorems, and why are they considered deep?

answered Aug 17, 2013 at 0:54

14 votes

What are the main structure theorems on finitely generated commutative monoids?

answered May 20, 2013 at 10:30

14 votes

Accepted

Easier reference for material like Diaconis's "Group representations in probability and statistics"

answered Aug 30, 2013 at 15:27

14 votes

Counterexamples in universal algebra

answered Jan 9, 2014 at 3:14

14 votes

Counterexamples in universal algebra

answered Jan 9, 2014 at 3:24

14 votes

Accepted

Is the free product $\mathbb{Z}*\mathbb{Z}/n\mathbb{Z}$ linear over $\mathbb{Z}$?

answered Sep 12, 2015 at 11:50

14 votes

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Non-isomorphic algebras becoming isomorphic after adding identities: mistake in an exercise

answered Apr 24, 2021 at 10:46

14 votes

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Global homological dimension of group rings

answered May 14, 2021 at 13:07

13 votes

Cayley graphs of $A_n.$

answered Apr 4, 2016 at 15:38

13 votes

Irreducible representation of $S_n$: contained in tensor powers of the standard representation?

answered Jul 31, 2020 at 18:01

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546 Answers

How many finitely-generated-by-elements-of-finite-order-groups are there?

Number of solutions to equations in finite groups

Tweetable Mathematics

Are unitarily equivalent permutation matrices permutation similar?

Modern developments in finite-dimensional linear algebra

Why all irreducible representations of compact groups are finite-dimensional ? [EDIT: Subtleties: AC,etc]

Was lattice theory central to mid-20th century mathematics?

What information is lost in $X \to \mathrm{Sh}(X)$?

Example of a group which has $\text{SL}_{n}(\mathbb{Z})$ as the automorphism group

Does every irreducible representation of a finite group G embed into its group algebra?

What are applications of commutativity theorems for rings?

Monoids of endomorphisms of nonisomorphic groups

Generalized cancelation properties ensuring a monoid embeds into a group

A proof for a statement about polynomial automorphism

Maximal number of maximal subgroups

Counterexamples in universal algebra

Do there exist non-isomorphic groups with the same cohomology?

General recipe for building C*-algebras out of combinatorial object

Are there "unsociable" irreps? (Definition inside)

An example of a proof that is explanatory but not beautiful? (or vice versa)

What are some deep theorems, and why are they considered deep?

What are the main structure theorems on finitely generated commutative monoids?

Easier reference for material like Diaconis's "Group representations in probability and statistics"

Counterexamples in universal algebra

Counterexamples in universal algebra

Is the free product $\mathbb{Z}*\mathbb{Z}/n\mathbb{Z}$ linear over $\mathbb{Z}$?

Non-isomorphic algebras becoming isomorphic after adding identities: mistake in an exercise

Global homological dimension of group rings

Cayley graphs of $A_n.$

Irreducible representation of $S_n$: contained in tensor powers of the standard representation?