User Tomas

12 votes

2 answers

413 views

Existence of closed operators with arbitrary dense domain of a given Banach space

asked Sep 27, 2015 at 11:17

10 votes

0 answers

346 views

Why is it hard to obtain improved $L^6$ bound of eigenfunction of Laplacian on 2-dimensional compact Riemannian manifold?

asked Oct 28, 2013 at 3:34

7 votes

1 answer

302 views

Is every $C_0$ semigroup on a Hilbert space automatically a $C_0$ group on a larger space?

asked Oct 11, 2015 at 15:29

6 votes

0 answers

192 views

Uniform estimates of Fourier transform of tempered functions with parameters

asked Mar 31, 2017 at 8:18

6 votes

0 answers

105 views

Can two eigenfunctions be almost linearly dependent in a region?

asked Dec 12, 2022 at 16:42

4 votes

1 answer

375 views

Uniqueness theorems related to Hardy Uncertainty Principle

asked Aug 9, 2013 at 13:13

4 votes

0 answers

340 views

Is the Fourier transform of $\frac{1}{\mu+|\xi|^{2\alpha}}$($\mu>0$) a bounded function?

asked Dec 24, 2013 at 2:33

4 votes

1 answer

349 views

What does a Zonal sphere harmonic look like?

asked Feb 11, 2014 at 5:06

3 votes

2 answers

655 views

Interior Schauder estimates with weights

asked Dec 29, 2013 at 1:54

3 votes

0 answers

123 views

$L^2$ bounds for the gradient of subsolutions to parabolic equation

asked Nov 13, 2013 at 1:30

3 votes

0 answers

180 views

Estimates of a bilinear oscillatory integral

asked May 19, 2014 at 19:05

3 votes

1 answer

559 views

Functions belong to $L^{\frac{2n}{n+1}}$ whose Fourier transforms are infinite on $S^{n-1}$

asked Sep 10, 2018 at 8:46

3 votes

0 answers

208 views

A question about Fourier transform of function of the type $Q(x)(1+P(x))^{z}$

asked May 30, 2016 at 13:09

2 votes

1 answer

90 views

Uncertainty principles and Anderson localization principles

asked Dec 27, 2022 at 15:16

2 votes

1 answer

162 views

References about spectral theory on Hyperbolic space

asked May 29, 2015 at 3:03

2 votes

0 answers

123 views

Properties of solutions of Parabolic type equations

asked Oct 20, 2014 at 13:34

2 votes

0 answers

138 views

Is logarithmic convexity of the heat kernel with complex time a general fact?

asked Jan 1, 2015 at 13:53

2 votes

2 answers

1k views

Is there a Calderon-Zygmund decomposition for $L^p$ function

asked Oct 22, 2013 at 0:26

2 votes

0 answers

146 views

Half-wave group $e^{it\sqrt{-\Delta_g}}$ for large $t$

asked Jan 21, 2014 at 2:08

2 votes

0 answers

135 views

eigenfunction of schrodinger operators

asked Mar 28, 2014 at 13:57

1 vote

0 answers

367 views

Possible generalizations of Hadamard's three line lemma

asked Jan 20, 2015 at 1:34

1 vote

1 answer

236 views

A small question about the necessary conditon of linear Kakeya conjecture

asked Dec 11, 2013 at 2:25

1 vote

0 answers

113 views

On the boundedness properties of the mapping $f\to |f|^{\frac12}$ on homogeneous Sobolev space

asked Mar 1, 2017 at 9:29

1 vote

1 answer

367 views

Reference for compact embedding between (weighted) Holder space on $\mathbb{R}^n$

asked Jan 19, 2019 at 1:32

1 vote

0 answers

126 views

Is this determinant well-known?

asked Dec 31, 2019 at 3:23

0 votes

1 answer

479 views

Paley-Wiener type theorem for integral functions with compact support

asked Jun 27, 2014 at 15:59

0 votes

1 answer

179 views

Uniform $L^p-L^{p'}$ bound of a Fourier multiplier

asked Jan 29, 2015 at 12:06

0 votes

1 answer

212 views

Differences between parabolic operators of second order and higher order

asked Nov 25, 2013 at 2:46

Stack Exchange Network

28 Questions

Existence of closed operators with arbitrary dense domain of a given Banach space

Why is it hard to obtain improved $L^6$ bound of eigenfunction of Laplacian on 2-dimensional compact Riemannian manifold?

Is every $C_0$ semigroup on a Hilbert space automatically a $C_0$ group on a larger space?

Uniform estimates of Fourier transform of tempered functions with parameters

Can two eigenfunctions be almost linearly dependent in a region?

Uniqueness theorems related to Hardy Uncertainty Principle

Is the Fourier transform of $\frac{1}{\mu+|\xi|^{2\alpha}}$($\mu>0$) a bounded function?

What does a Zonal sphere harmonic look like?

Interior Schauder estimates with weights

$L^2$ bounds for the gradient of subsolutions to parabolic equation

Estimates of a bilinear oscillatory integral

Functions belong to $L^{\frac{2n}{n+1}}$ whose Fourier transforms are infinite on $S^{n-1}$

A question about Fourier transform of function of the type $Q(x)(1+P(x))^{z}$

Uncertainty principles and Anderson localization principles

References about spectral theory on Hyperbolic space

Properties of solutions of Parabolic type equations

Is logarithmic convexity of the heat kernel with complex time a general fact?

Is there a Calderon-Zygmund decomposition for $L^p$ function

Half-wave group $e^{it\sqrt{-\Delta_g}}$ for large $t$

eigenfunction of schrodinger operators

Possible generalizations of Hadamard's three line lemma

A small question about the necessary conditon of linear Kakeya conjecture

On the boundedness properties of the mapping $f\to |f|^{\frac12}$ on homogeneous Sobolev space

Reference for compact embedding between (weighted) Holder space on $\mathbb{R}^n$

Is this determinant well-known?

Paley-Wiener type theorem for integral functions with compact support

Uniform $L^p-L^{p'}$ bound of a Fourier multiplier

Differences between parabolic operators of second order and higher order