User an_ordinary_mathematician

15 votes

1 answer

1k views

A cipher proposed by Littlewood

asked May 1 at 15:44

11 votes

1 answer

487 views

Is the spectrum of a "self adjoint" operator real on $\ell^p$?

asked Apr 1, 2020 at 20:06

8 votes

1 answer

199 views

Topological property of the space of probability measures

asked Nov 11 at 11:06

7 votes

3 answers

698 views

A generalization of discrete Hilbert's transform (Montgomery's inequality)

asked Mar 22, 2020 at 17:18

5 votes

1 answer

273 views

A domination property for the Hardy space $H^1$

asked Sep 15, 2020 at 13:21

4 votes

1 answer

159 views

Extending a metric in a bi-Lipschitz way

asked Sep 27, 2022 at 12:51

4 votes

1 answer

443 views

Reference or proof of a theorem of L. Fejér on summability of Fourier series

asked May 9 at 9:32

3 votes

0 answers

90 views

Upcrossing lemma and subharmonic functions

asked Feb 18 at 12:59

3 votes

0 answers

205 views

Beurling's theorem on invariant subspaces

asked Jun 14, 2022 at 14:46

3 votes

0 answers

125 views

An open problem of Hardy and Littlewood on $p$-integral means

asked Jul 13, 2023 at 11:53

3 votes

1 answer

210 views

Exponential growth of shortest vector norm for successive lattices corresponding to powers of a matrix

asked Oct 13, 2023 at 9:20

2 votes

0 answers

100 views

On the decay of a supersolution of a Sturm Liouville eigenvalue problem

asked Dec 7, 2023 at 11:48

2 votes

1 answer

138 views

On a density property of signed singular measures

asked Jan 29 at 14:35

2 votes

2 answers

831 views

Existence of a bounded right inverse to a linear closed surjective operator

asked Jun 19, 2020 at 11:38

2 votes

0 answers

190 views

A sharp version of a Tauberian theorem

asked May 5 at 14:47

1 vote

0 answers

39 views

About Carleson measures on the Hardy space on the bidisc

asked Oct 28 at 22:01

1 vote

0 answers

69 views

Hilbert like transform on the circle

asked Jun 9, 2023 at 12:47

1 vote

1 answer

44 views

Wold decomposition of toral endomorphisms

asked Nov 23, 2023 at 18:08

1 vote

0 answers

82 views

Where this function attains its maximum?

asked Jul 28, 2022 at 12:47

1 vote

0 answers

62 views

A question on a paper of B. S. Henriksen

asked Oct 6, 2022 at 15:35

1 vote

0 answers

82 views

Weak maximum principle for a perturbation of the Laplacian

asked Mar 6, 2020 at 11:24

0 votes

0 answers

68 views

Closed graph theorem for cones?

asked May 6, 2020 at 18:31

0 votes

1 answer

121 views

A property of the canonical dual frame in a Hilbert space

asked Apr 17, 2023 at 18:06

0 votes

1 answer

153 views

An integral Minkowski inequality for the quasi-Banach case?

asked Jul 20, 2023 at 13:52

0 votes

0 answers

98 views

Sufficient condition for weak convergence in Banach spaces

asked Sep 18 at 8:49

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25 Questions

A cipher proposed by Littlewood

Is the spectrum of a "self adjoint" operator real on $\ell^p$?

Topological property of the space of probability measures

A generalization of discrete Hilbert's transform (Montgomery's inequality)

A domination property for the Hardy space $H^1$

Extending a metric in a bi-Lipschitz way

Reference or proof of a theorem of L. Fejér on summability of Fourier series

Upcrossing lemma and subharmonic functions

Beurling's theorem on invariant subspaces

An open problem of Hardy and Littlewood on $p$-integral means

Exponential growth of shortest vector norm for successive lattices corresponding to powers of a matrix

On the decay of a supersolution of a Sturm Liouville eigenvalue problem

On a density property of signed singular measures

Existence of a bounded right inverse to a linear closed surjective operator

A sharp version of a Tauberian theorem

About Carleson measures on the Hardy space on the bidisc

Hilbert like transform on the circle

Wold decomposition of toral endomorphisms

Where this function attains its maximum?

A question on a paper of B. S. Henriksen

Weak maximum principle for a perturbation of the Laplacian

Closed graph theorem for cones?

A property of the canonical dual frame in a Hilbert space

An integral Minkowski inequality for the quasi-Banach case?

Sufficient condition for weak convergence in Banach spaces