List questions from harmonic-analysis

Published on 08 Apr 2026 - 21:18

27

Views

Fourier transform of a function defined on a smooth surface in Rd

Published on 08 Apr 2026 - 18:12

243

Views

Two definitions of complete algebraic reducibility are equivalent by Zorn's lemma. Does this equivalence stay for topological spaces?

Published on 12 Apr 2026 - 17:42

84

Views

Sinusoids as solutions to differential equations

Published on 11 Apr 2026 - 0:32

129

Views

Haar measure of $O(n)$ vs. $U(n)$?

Published on 13 Apr 2026 - 17:43

122

Views

$K(x,t)=2\pi\sum_{n=1}^\infty n\sin(n\pi x)e^{-n^2\pi^2t}$ satisfies some "pseudo-good-kernel" properties

Published on 15 Apr 2026 - 2:47

36

Views

Convert the eastimate $\|u\|_{L^q(\Bbb{R}^n)}\le \|(\Delta +z) u\|_{L^p}$ into multiplier form

Published on 15 Apr 2026 - 11:39

47

Views

Prove $ \|u\|_{L^q(\Bbb{R}^n)}\le \|(\Delta +z) u\|_{L^p(\Bbb{R}^n)} $ when $|z|\le 1$

Published on 14 Apr 2026 - 23:01

261

Views

Regularity of $|u|^{\alpha}$ when $u$ is Schwartz.

Published on 12 Apr 2026 - 22:45

73

Views

A question about Peter Weyl theorem

Published on 11 Apr 2026 - 20:19

52

Views

If f(z) is analytic then u(x,y)=Re(f(x+iy)) is harmonic

Published on 14 Apr 2026 - 23:07

151

Views

Proof of Besov space embeddings: $B_{p, \infty}^{s+\varepsilon}$ is continuously embedded in $B_{p, 1}^s$

Published on 15 Apr 2026 - 12:20

53

Views

Recovering an integral from a Fourier transform

Published on 10 Apr 2026 - 20:17

241

Views

On a step in Brezis-Merle's inequality

Published on 14 Apr 2026 - 16:02

102

Views

Riemann-Lebesgue lemma and regularity for partial Fourier transform

Published on 13 Apr 2026 - 10:53

List Question

Fourier transform of complex conjugation of a function

Fourier transform of a function defined on a smooth surface in Rd

Two definitions of complete algebraic reducibility are equivalent by Zorn's lemma. Does this equivalence stay for topological spaces?

Sinusoids as solutions to differential equations

Haar measure of $O(n)$ vs. $U(n)$?

$K(x,t)=2\pi\sum_{n=1}^\infty n\sin(n\pi x)e^{-n^2\pi^2t}$ satisfies some "pseudo-good-kernel" properties

Convert the eastimate $\|u\|_{L^q(\Bbb{R}^n)}\le \|(\Delta +z) u\|_{L^p}$ into multiplier form

Prove $ \|u\|_{L^q(\Bbb{R}^n)}\le \|(\Delta +z) u\|_{L^p(\Bbb{R}^n)} $ when $|z|\le 1$

Regularity of $|u|^{\alpha}$ when $u$ is Schwartz.

A question about Peter Weyl theorem

If f(z) is analytic then u(x,y)=Re(f(x+iy)) is harmonic

Proof of Besov space embeddings: $B_{p, \infty}^{s+\varepsilon}$ is continuously embedded in $B_{p, 1}^s$

Recovering an integral from a Fourier transform

On a step in Brezis-Merle's inequality

Riemann-Lebesgue lemma and regularity for partial Fourier transform

Trending Questions

Popular # Hahtags

Popular Questions