User Alin Galatan

13 votes

2 answers

768 views

How hard (P, NP, NP-hard) is it to compute Schur norms of matrices (as multipliers)?

asked Oct 26, 2013 at 3:08

12 votes

3 answers

1k views

Dimensions and number of complex irreducible representations for SL3(Z/pZ)

asked Sep 8, 2013 at 19:36

6 votes

0 answers

502 views

Faithful and weakly-mixing representations of Property (T) groups in relation to left regular rep

asked Oct 30, 2014 at 20:38

5 votes

0 answers

321 views

Unitary representations of Tarski Monsters and other beasts

asked Nov 21, 2014 at 7:01

4 votes

0 answers

175 views

Is the Tensor/Exterior square $G\otimes G$ or $G\wedge G$ of infinite p-group also a p-group?

asked Sep 22, 2015 at 2:26

4 votes

0 answers

172 views

Example of "exotic" verbal subgroups of free groups

asked Oct 22, 2015 at 0:55

3 votes

1 answer

506 views

Is there a link between $H_2(G,\mathbb{Z})$, the Schur Multiplier of a group, and the "other" Schur multipliers of a group?

asked Jan 8, 2016 at 21:41

3 votes

1 answer

166 views

Sets $E$ in $\mathbb{Z}$ such that any $l^2$ function with support on $E$ comes from Fourier of a continuous function

asked Nov 12, 2013 at 21:29

1 vote

2 answers

330 views

Characterisation of compact operators

asked Feb 28, 2014 at 21:04

1 vote

0 answers

129 views

Differentiability of $f*g$ on the circle, for integrable f, bounded g, and some decay of the Fourier coefficients of f

asked Oct 31, 2013 at 3:39

0 votes

1 answer

130 views

Extending affine maps defined on weakly closed sets to the whole topological space

asked May 3, 2014 at 0:41

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11 Questions

How hard (P, NP, NP-hard) is it to compute Schur norms of matrices (as multipliers)?

Dimensions and number of complex irreducible representations for SL3(Z/pZ)

Faithful and weakly-mixing representations of Property (T) groups in relation to left regular rep

Unitary representations of Tarski Monsters and other beasts

Is the Tensor/Exterior square $G\otimes G$ or $G\wedge G$ of infinite p-group also a p-group?

Example of "exotic" verbal subgroups of free groups

Is there a link between $H_2(G,\mathbb{Z})$, the Schur Multiplier of a group, and the "other" Schur multipliers of a group?

Sets $E$ in $\mathbb{Z}$ such that any $l^2$ function with support on $E$ comes from Fourier of a continuous function

Characterisation of compact operators

Differentiability of $f*g$ on the circle, for integrable f, bounded g, and some decay of the Fourier coefficients of f

Extending affine maps defined on weakly closed sets to the whole topological space