User Ayman Moussa

27 votes

4 answers

8k views

Proofs of Young's inequality for convolution

asked Jul 19, 2019 at 9:13

12 votes

2 answers

2k views

Reference on Minty's trick

asked Sep 12, 2016 at 20:51

11 votes

0 answers

564 views

Polynomial mapping primes to primes

asked Apr 19, 2017 at 16:45

8 votes

1 answer

1k views

Example of proof using the generic matrix

asked Nov 25, 2014 at 19:19

8 votes

3 answers

1k views

Counterexample of non-negative sequence weakly converging in $\mathscr{M}^1$ but not $L^1$

asked May 22, 2013 at 8:46

8 votes

2 answers

396 views

Best constant approximation in $L^p(\Omega)$

asked Oct 10, 2019 at 9:53

7 votes

0 answers

131 views

Approximation of a continuous curve on commuting matrices

asked Jul 5 at 9:41

6 votes

2 answers

1k views

Sufficient condition for $L^p$ multiplier on the torus

asked Jan 31, 2013 at 12:46

6 votes

2 answers

379 views

Norms on $\mathbb{R}^d$ whose linear isometries are the hypercube group

asked Feb 15, 2017 at 9:43

5 votes

2 answers

679 views

Banach algebra of smooth functions

asked Nov 10, 2020 at 8:58

5 votes

1 answer

490 views

$L^2$ uniform integrability in terms of Fourier coefficients

asked Dec 22, 2020 at 22:02

5 votes

1 answer

375 views

Weak Hessian of the distance function

asked Oct 28, 2022 at 9:27

4 votes

1 answer

65 views

Distance to finite degree polynomials for BV functions

asked Jan 5, 2022 at 16:46

4 votes

0 answers

130 views

Systems of parabolic equations -- Petrovskii's condition

asked Mar 17, 2023 at 13:42

4 votes

1 answer

2k views

Norm of convolution operator

asked Aug 15, 2019 at 21:17

4 votes

2 answers

197 views

Periodic orbits in the plane

asked May 12, 2016 at 16:55

4 votes

2 answers

924 views

Rate of convergence of mollifiers // Sobolev norms

asked Jul 9, 2019 at 15:15

3 votes

0 answers

381 views

Extension divergence-free, curl-converging vector field

asked Mar 9, 2013 at 9:29

3 votes

1 answer

506 views

Concavity/convexity of distance-to-boundary function

asked Aug 22, 2022 at 4:47

2 votes

2 answers

160 views

$\varepsilon$-covering number after diffeomorphism

asked Jan 16, 2014 at 18:29

2 votes

0 answers

106 views

Hilbert Transform and multiplier in $\mathbb{C}(X)$

asked May 6, 2016 at 14:08

2 votes

1 answer

302 views

Reference for the parabolic Cauchy problem on $\mathbb{R}^N$ or $\mathbb{T}^N$

asked Aug 14, 2017 at 10:01

1 vote

1 answer

259 views

Heat equation with source term in $L^1$

asked Aug 11, 2017 at 16:24

1 vote

0 answers

315 views

Maximal regularity heat equation

asked Jan 19, 2023 at 16:42

1 vote

0 answers

49 views

P1-finite element as convolution of P0-finite element

asked Nov 18, 2021 at 17:35

1 vote

0 answers

81 views

Hardy maximal function on the torus

asked Dec 18, 2020 at 22:04

0 votes

0 answers

123 views

Reference for the Hardy maximal function on the torus

asked Sep 17, 2017 at 19:54

Stack Exchange Network

27 Questions

Proofs of Young's inequality for convolution

Reference on Minty's trick

Polynomial mapping primes to primes

Example of proof using the generic matrix

Counterexample of non-negative sequence weakly converging in $\mathscr{M}^1$ but not $L^1$

Best constant approximation in $L^p(\Omega)$

Approximation of a continuous curve on commuting matrices

Sufficient condition for $L^p$ multiplier on the torus

Norms on $\mathbb{R}^d$ whose linear isometries are the hypercube group

Banach algebra of smooth functions

$L^2$ uniform integrability in terms of Fourier coefficients

Weak Hessian of the distance function

Distance to finite degree polynomials for BV functions

Systems of parabolic equations -- Petrovskii's condition

Norm of convolution operator

Periodic orbits in the plane

Rate of convergence of mollifiers // Sobolev norms

Extension divergence-free, curl-converging vector field

Concavity/convexity of distance-to-boundary function

$\varepsilon$-covering number after diffeomorphism

Hilbert Transform and multiplier in $\mathbb{C}(X)$

Reference for the parabolic Cauchy problem on $\mathbb{R}^N$ or $\mathbb{T}^N$

Heat equation with source term in $L^1$

Maximal regularity heat equation

P1-finite element as convolution of P0-finite element

Hardy maximal function on the torus

Reference for the Hardy maximal function on the torus