User Yemon Choi

17 votes

2 answers

832 views

The sum (with multiplicity) of the cubes of irreducible character degrees of a finite group

asked Apr 20, 2021 at 19:26

6 votes

0 answers

227 views

Are bounded groups of thin operators on Hilbert space similar to groups of unitaries?

asked Sep 21, 2023 at 22:07

3 votes

0 answers

208 views

References for properties/examples of breadth in (semi)lattices

asked Oct 7, 2012 at 2:43

38 votes

2 answers

5k views

Is the set of primes "translation-finite"?

asked Oct 29, 2009 at 21:52

16 votes

2 answers

2k views

Where is the Erdős–Rado theorem stated in Erdős and Rado's Bull AMS paper?

asked Dec 23, 2014 at 0:50

11 votes

2 answers

515 views

Moments of character degrees - is this result new or folklore?

asked Jan 5, 2023 at 18:10

8 votes

0 answers

198 views

Looking for the source of expository passages concerning the Adams spectral sequence

asked Dec 20, 2022 at 0:59

2 votes

1 answer

627 views

The Borel sigma-algebra of a product of two topological spaces

asked Sep 7, 2022 at 17:24

3 votes

0 answers

98 views

Terminology for the "natural probability measure" on the set of irreducible characters of a finite group

asked May 2, 2022 at 15:09

1 vote

0 answers

135 views

When can we extend an equalizer to a cosimplicial resolution?

asked Dec 18, 2021 at 0:09

4 votes

0 answers

123 views

Factorization in the ring of integers of a particular biquadratic number field, and questions about norms

asked Nov 17, 2021 at 23:57

4 votes

0 answers

174 views

Weaker analogues of amenability for groups of piecewise projective homeomorphisms

asked Sep 16, 2021 at 2:39

2 votes

0 answers

273 views

Can ${2n \choose n}$ ever be divisble by $2n+1$ (for positive integer $n$)?

asked Aug 7, 2021 at 15:59

4 votes

0 answers

81 views

Question about terminology for a class of "self-modular" mappings between rings

asked Jul 12, 2021 at 20:33

5 votes

0 answers

212 views

The forgetful functor from Groups to Semigroups

asked Mar 20, 2021 at 15:27

2 votes

0 answers

141 views

Reference for an analogue of Goursat's lemma for noncommutative rings?

asked Sep 13, 2020 at 13:51

8 votes

0 answers

187 views

History of the Lewis-Stegall theorem on factorization of representable operators

asked Sep 5, 2020 at 17:17

8 votes

0 answers

117 views

Literature and history for: lifting matrix units modulo various kinds of ideal

asked Jul 15, 2020 at 4:28

5 votes

0 answers

87 views

Reference request: sufficiently smooth functions on the plane belong to the projective tensor square of $L^2$ of the line

asked May 31, 2020 at 22:12

3 votes

0 answers

58 views

Isoclinism for Lie groups: existing accounts of basic properties?

asked Apr 24, 2020 at 21:46

2 votes

0 answers

75 views

Reference request for certain kinds of FC-groups

asked Mar 27, 2020 at 17:26

5 votes

1 answer

169 views

Hopf C-star algebra/comodules using a Fubini tensor product rather than the minimal tensor product?

asked Feb 13, 2020 at 22:31

5 votes

0 answers

145 views

Factorizing "compact" morphisms through "reflexive" objects (with respect to a given monad)

asked Jan 12, 2020 at 22:32

1 vote

1 answer

105 views

Does taking the modulus preserve weak $p$-summability of sequences in $L_q$?

asked Dec 3, 2019 at 2:08

3 votes

0 answers

92 views

Terminology for set systems: "trace" or "projection"?

asked Nov 22, 2019 at 17:38

6 votes

2 answers

528 views

"Identity tensor transpose" as a map $M_n \hat{\otimes} M_n \to M_n \overline{\otimes} M_n$

asked Apr 25, 2016 at 18:48

2 votes

1 answer

80 views

Structure of extensions arising in Lie approximation of connected groups

asked Aug 14, 2019 at 16:59

10 votes

1 answer

195 views

Verbal description, or terminology, for the ${\mathcal L}_p$-spaces of Lindenstrauss and Pelczynski

asked Jul 1, 2019 at 15:31

11 votes

1 answer

333 views

Notions in the literature capturing the "symmetric" or "homogeneous" flavour of $L_p$?

asked Jun 8, 2019 at 23:15

7 votes

0 answers

176 views

Does this ideal in $B(L_1)$ have a (bounded) right approximate identity?

asked May 14, 2019 at 17:18

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94 Questions

The sum (with multiplicity) of the cubes of irreducible character degrees of a finite group

Are bounded groups of thin operators on Hilbert space similar to groups of unitaries?

References for properties/examples of breadth in (semi)lattices

Is the set of primes "translation-finite"?

Where is the Erdős–Rado theorem stated in Erdős and Rado's Bull AMS paper?

Moments of character degrees - is this result new or folklore?

Looking for the source of expository passages concerning the Adams spectral sequence

The Borel sigma-algebra of a product of two topological spaces

Terminology for the "natural probability measure" on the set of irreducible characters of a finite group

When can we extend an equalizer to a cosimplicial resolution?

Factorization in the ring of integers of a particular biquadratic number field, and questions about norms

Weaker analogues of amenability for groups of piecewise projective homeomorphisms

Can ${2n \choose n}$ ever be divisble by $2n+1$ (for positive integer $n$)?

Question about terminology for a class of "self-modular" mappings between rings

The forgetful functor from Groups to Semigroups

Reference for an analogue of Goursat's lemma for noncommutative rings?

History of the Lewis-Stegall theorem on factorization of representable operators

Literature and history for: lifting matrix units modulo various kinds of ideal

Reference request: sufficiently smooth functions on the plane belong to the projective tensor square of $L^2$ of the line

Isoclinism for Lie groups: existing accounts of basic properties?

Reference request for certain kinds of FC-groups

Hopf C-star algebra/comodules using a Fubini tensor product rather than the minimal tensor product?

Factorizing "compact" morphisms through "reflexive" objects (with respect to a given monad)

Does taking the modulus preserve weak $p$-summability of sequences in $L_q$?

Terminology for set systems: "trace" or "projection"?

"Identity tensor transpose" as a map $M_n \hat{\otimes} M_n \to M_n \overline{\otimes} M_n$

Structure of extensions arising in Lie approximation of connected groups

Verbal description, or terminology, for the ${\mathcal L}_p$-spaces of Lindenstrauss and Pelczynski

Notions in the literature capturing the "symmetric" or "homogeneous" flavour of $L_p$?

Does this ideal in $B(L_1)$ have a (bounded) right approximate identity?