User PhoemueX

15 votes

1 answer

498 views

For what LCH groups is the Haar measure $\mu(U x U)$ bounded?

asked Aug 17, 2021 at 13:34

9 votes

1 answer

413 views

Existence of Laurent series with zeroes at $e^{2n}$ ($n \in \Bbb{N}_0$) and extremely fast coefficient decay

asked Feb 8, 2019 at 13:10

7 votes

0 answers

478 views

Characterizing the sum $L^1 + L^\infty + L^{1,\infty} + L^{\infty, 1}$ of iterated Lebesgue spaces "by duality"

asked Jun 19, 2017 at 14:27

6 votes

2 answers

2k views

Reverse Hausdorff Young for nonnegative functions

asked Oct 7, 2014 at 21:48

5 votes

0 answers

210 views

Existence of $A\subset\Bbb{R}^n$ of finite measure and $\hat{1_A}\in\bigcap_{q>1}L^q$, but s.t. for some $1<p<\infty$, $1_A$ is no $L^p$-Fourier mult

asked Oct 28, 2017 at 10:05

5 votes

1 answer

381 views

Sufficient criteria for $X \subset \mathcal{H}$ to be a Lipschitz (or unif. cont.) retract of $\mathcal{H}$

asked Dec 19, 2017 at 11:02

5 votes

1 answer

171 views

Existence of Laurent series with zeroes at $𝑒^{2𝑛}$ ($𝑛∈ℕ_0$) and even faster coefficient decay

asked Feb 12, 2019 at 15:23

3 votes

0 answers

77 views

How linearly independent are orthonormal wavelet systems (Daubechies wavelets)?

asked Sep 13 at 15:55

2 votes

0 answers

811 views

Existence of unbounded $M \subset \Bbb{R}$ of finite measure s.t. $1_M$ is $L^p$-Fourier multiplier

asked Apr 22, 2018 at 17:14

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9 Questions

For what LCH groups is the Haar measure $\mu(U x U)$ bounded?

Existence of Laurent series with zeroes at $e^{2n}$ ($n \in \Bbb{N}_0$) and extremely fast coefficient decay

Characterizing the sum $L^1 + L^\infty + L^{1,\infty} + L^{\infty, 1}$ of iterated Lebesgue spaces "by duality"

Reverse Hausdorff Young for nonnegative functions

Existence of $A\subset\Bbb{R}^n$ of finite measure and $\hat{1_A}\in\bigcap_{q>1}L^q$, but s.t. for some $1<p<\infty$, $1_A$ is no $L^p$-Fourier mult

Sufficient criteria for $X \subset \mathcal{H}$ to be a Lipschitz (or unif. cont.) retract of $\mathcal{H}$

Existence of Laurent series with zeroes at $𝑒^{2𝑛}$ ($𝑛∈ℕ_0$) and even faster coefficient decay

How linearly independent are orthonormal wavelet systems (Daubechies wavelets)?

Existence of unbounded $M \subset \Bbb{R}$ of finite measure s.t. $1_M$ is $L^p$-Fourier multiplier