User Dirk

33 votes

8 answers

8k views

When (if ever) disclose your identity as a reviewer?

asked May 29, 2012 at 20:52

31 votes

1 answer

4k views

Determinants of binary matrices

asked Jan 15, 2019 at 20:04

25 votes

6 answers

10k views

Metrization of weak convergence of signed measures

asked Jan 30, 2013 at 9:24

20 votes

1 answer

25k views

When does the $4\times 4$ 'false Sarrus rule' compute the determinant correctly?

asked Aug 27, 2012 at 21:34

19 votes

4 answers

8k views

Unique limits of sequences plus what implies Hausdorff?

asked Sep 7, 2011 at 9:21

18 votes

4 answers

2k views

Does "taking the dual space" stabilize?

asked Nov 15, 2010 at 19:21

14 votes

2 answers

2k views

What is the maximum diameter of $N$ steps of a random walk?

asked Oct 13, 2011 at 18:51

14 votes

1 answer

1k views

Area of the minimal surface of a non-planar quadrilateral in 3d

asked Nov 7, 2014 at 14:28

12 votes

0 answers

7k views

Otelbayev's approach to Navier-Stokes [closed]

asked Jan 13, 2014 at 16:50

11 votes

1 answer

1k views

Geometric measures different from Hausdorff

asked Jul 15, 2014 at 8:03

8 votes

1 answer

622 views

Completion of spaces of measures w.r.t. weak norms

asked Mar 1, 2016 at 13:18

8 votes

0 answers

154 views

How many facets can $\{\|D^T x\|_1\leq 1\}$ have?

asked Apr 25, 2014 at 11:45

8 votes

2 answers

548 views

Is taking the positive part of a measure a continuous operation?

asked Oct 18, 2018 at 13:02

8 votes

1 answer

213 views

How do sets with unit fractional Hausdorff measure of dimension $>1$ look like?

asked Oct 24, 2019 at 14:29

7 votes

4 answers

556 views

Reference request: "Higher order eigentuples" as generalized eigenvectors?

asked Aug 22 at 16:21

6 votes

1 answer

495 views

Polynomials with prescribed points to match prescribed bounds

asked Nov 3, 2011 at 12:58

5 votes

1 answer

674 views

Complete folds and one cut

asked Jun 18, 2019 at 11:10

4 votes

2 answers

207 views

Is the prox-residual monotone?

asked Jul 15, 2014 at 8:37

3 votes

1 answer

568 views

Directional derivates and unique subgradients

asked Dec 20, 2013 at 8:51

3 votes

2 answers

1k views

Do you know this form of an uncertainty principle?

asked Sep 20, 2011 at 8:50

2 votes

1 answer

344 views

Estimates of eigenvalues

asked Feb 15, 2017 at 17:18

1 vote

2 answers

549 views

Does an $n$ dimensional subspace intersect the $n$-facets of the unit cube?

asked Dec 7, 2011 at 20:26

1 vote

2 answers

115 views

Positive part of "outer sums" of measures

asked Dec 5, 2018 at 14:45

1 vote

0 answers

195 views

Lower semicontinuity of Bregman distances/divergences

asked Nov 5, 2010 at 5:00

1 vote

1 answer

142 views

Calculating $\mathbb{E}\left(\tfrac{XX^T}{\|AX\|^2}\right)$ for isotropic random vectors $X$

asked Feb 27, 2023 at 16:18

0 votes

0 answers

168 views

The derived representation and $H_\pi^\infty$

asked Jul 12, 2011 at 13:13

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26 Questions

When (if ever) disclose your identity as a reviewer?

Determinants of binary matrices

Metrization of weak convergence of signed measures

When does the $4\times 4$ 'false Sarrus rule' compute the determinant correctly?

Unique limits of sequences plus what implies Hausdorff?

Does "taking the dual space" stabilize?

What is the maximum diameter of $N$ steps of a random walk?

Area of the minimal surface of a non-planar quadrilateral in 3d

Otelbayev's approach to Navier-Stokes [closed]

Geometric measures different from Hausdorff

Completion of spaces of measures w.r.t. weak norms

How many facets can $\{\|D^T x\|_1\leq 1\}$ have?

Is taking the positive part of a measure a continuous operation?

How do sets with unit fractional Hausdorff measure of dimension $>1$ look like?

Reference request: "Higher order eigentuples" as generalized eigenvectors?

Polynomials with prescribed points to match prescribed bounds

Complete folds and one cut

Is the prox-residual monotone?

Directional derivates and unique subgradients

Do you know this form of an uncertainty principle?

Estimates of eigenvalues

Does an $n$ dimensional subspace intersect the $n$-facets of the unit cube?

Positive part of "outer sums" of measures

Lower semicontinuity of Bregman distances/divergences

Calculating $\mathbb{E}\left(\tfrac{XX^T}{\|AX\|^2}\right)$ for isotropic random vectors $X$

The derived representation and $H_\pi^\infty$