User Piero D'Ancona

23 votes

3 answers

3k views

Trapped rays bouncing between two convex bodies

asked Sep 10, 2010 at 14:00

21 votes

4 answers

2k views

A question on the integral of Hilbert valued functions

asked May 24, 2011 at 12:26

17 votes

4 answers

2k views

An experiment on random matrices

asked Jul 3, 2010 at 10:23

12 votes

1 answer

1k views

Refereeing a paper containing strong statements about other papers

asked Jul 17, 2014 at 10:13

11 votes

3 answers

887 views

Notations for dual spaces and dual operators

asked Jan 15, 2017 at 13:04

10 votes

4 answers

783 views

Does a quantitative version of Fredholm theory exist?

asked Sep 30, 2010 at 9:35

9 votes

1 answer

710 views

Counterexamples to weak dispersion for the Schrödinger group

asked Nov 2, 2022 at 8:57

6 votes

1 answer

581 views

A puzzling question on real interpolation

asked Jul 4, 2010 at 9:20

6 votes

3 answers

252 views

Stability of the spectrum for perturbations of the boundary

asked Jun 4, 2012 at 17:24

6 votes

1 answer

969 views

A matrix inequality involving the Hilbert-Schmidt norm

asked Dec 10, 2012 at 16:11

5 votes

1 answer

241 views

Dense subspaces of the Hardy space $H^1$

asked Jun 10, 2022 at 8:57

5 votes

1 answer

316 views

Newtonian potentials of balls and spheres

asked Mar 26, 2023 at 13:55

4 votes

0 answers

187 views

Uniform bound for Bessel functions

asked Mar 30 at 11:36

4 votes

1 answer

168 views

Uniform decay of $J'_{\nu}(x)$ for $x\gg1$

asked May 5 at 14:31

4 votes

1 answer

212 views

Uniform iid sequence

asked Aug 17, 2022 at 18:04

3 votes

0 answers

168 views

Dual Lorentz spaces

asked Mar 22, 2019 at 17:31

3 votes

0 answers

91 views

The numerical range of a composition of two operators

asked Mar 2, 2017 at 10:59

3 votes

0 answers

253 views

Interior regularity for elliptic operators with non smooth coefficients

asked Apr 22, 2016 at 17:29

3 votes

1 answer

178 views

Subharmonic distributions on the plane

asked Mar 24, 2023 at 14:06

2 votes

0 answers

451 views

Approximating a $C^1$ function in $Lip$ norm with piecewise linear

asked Sep 12, 2016 at 7:38

2 votes

1 answer

57 views

High order difference operator applied to 1/u

asked Feb 2, 2022 at 12:00

1 vote

1 answer

171 views

Notation for infinite cartesian products

asked Sep 19, 2022 at 13:49

1 vote

1 answer

86 views

Constructive definitions of the Sobolev trace

asked Apr 8, 2018 at 8:47

1 vote

1 answer

160 views

$L^p$ estimate for (powers of) a Laplacian with inverse square potential

asked Apr 11, 2014 at 17:51

1 vote

1 answer

101 views

On the definition of symmetric rearrangement

asked Mar 5 at 5:21

1 vote

0 answers

51 views

Sufficient conditions for boundedness of Fourier transform

asked Nov 8 at 8:30

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26 Questions

Trapped rays bouncing between two convex bodies

A question on the integral of Hilbert valued functions

An experiment on random matrices

Refereeing a paper containing strong statements about other papers

Notations for dual spaces and dual operators

Does a quantitative version of Fredholm theory exist?

Counterexamples to weak dispersion for the Schrödinger group

A puzzling question on real interpolation

Stability of the spectrum for perturbations of the boundary

A matrix inequality involving the Hilbert-Schmidt norm

Dense subspaces of the Hardy space $H^1$

Newtonian potentials of balls and spheres

Uniform bound for Bessel functions

Uniform decay of $J'_{\nu}(x)$ for $x\gg1$

Uniform iid sequence

Dual Lorentz spaces

The numerical range of a composition of two operators

Interior regularity for elliptic operators with non smooth coefficients

Subharmonic distributions on the plane

Approximating a $C^1$ function in $Lip$ norm with piecewise linear

High order difference operator applied to 1/u

Notation for infinite cartesian products

Constructive definitions of the Sobolev trace

$L^p$ estimate for (powers of) a Laplacian with inverse square potential

On the definition of symmetric rearrangement

Sufficient conditions for boundedness of Fourier transform