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an_ordinary_mathematician
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11 votes
1 answer
442 views

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

7 votes
3 answers
641 views

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

5 votes
1 answer
246 views

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

4 votes
1 answer
149 views

Extending a metric in a bi-Lipschitz way

3 votes
0 answers
154 views

Beurling's theorem on invariant subspaces

3 votes
0 answers
114 views

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

3 votes
1 answer
188 views

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

2 votes
0 answers
96 views

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

2 votes
1 answer
115 views

On a density property of signed singular measures

2 votes
0 answers
65 views

Upcrossing lemma and subharmonic functions

2 votes
2 answers
646 views

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

1 vote
0 answers
52 views

Hilbert like transform on the circle

1 vote
1 answer
43 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
91 views

A property of the canonical dual frame in a Hilbert space

0 votes
1 answer
124 views

An integral Minkowski inequality for the quasi-Banach case?