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an_ordinary_mathematician
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11 votes
1 answer
438 views

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

7 votes
3 answers
639 views

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

5 votes
1 answer
240 views

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

4 votes
1 answer
144 views

Extending a metric in a bi-Lipschitz way

3 votes
0 answers
144 views

Beurling's theorem on invariant subspaces

3 votes
1 answer
185 views

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

2 votes
0 answers
95 views

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

2 votes
1 answer
112 views

On a density property of signed singular measures

2 votes
0 answers
62 views

Upcrossing lemma and subharmonic functions

2 votes
2 answers
620 views

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

2 votes
0 answers
111 views

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

1 vote
0 answers
49 views

Hilbert like transform on the circle

1 vote
1 answer
42 views

Wold decomposition of toral endomorphisms

1 vote
0 answers
82 views

Where this function attains its maximum?

1 vote
0 answers
60 views

A question on a paper of B. S. Henriksen

1 vote
0 answers
80 views

Weak maximum principle for a perturbation of the Laplacian

0 votes
0 answers
65 views

Closed graph theorem for cones?

0 votes
1 answer
90 views

A property of the canonical dual frame in a Hilbert space

0 votes
1 answer
121 views

An integral Minkowski inequality for the quasi-Banach case?