Question

A proof about approximations in L1

score 53 · Answer 1 · 2026-04-10 17:47:10

53

Views

A proof about approximations in L1

Published on 10 Apr 2026 - 17:47

score 615 · Answer 2 · 2026-04-09 17:29:43

615

Views

Having trouble understanding why the dot product of e^(pi*i) and the conjugate of its derivative does not equal 0?

Published on 09 Apr 2026 - 17:29

score 51 · Answer 3 · 2026-04-13 17:15:34

51

Views

Inequality for Fourier transform $\mathcal{F}(f)$

Published on 13 Apr 2026 - 17:15

score 314 · Answer 4 · 2020-03-21 23:02:51

314

Views

What is the DFT of $x(2n)$ if you know the DFT of $x(n)$?

Published on 21 Mar 2020 - 23:02

score 201 · Answer 5 · 2026-04-01 20:42:47

201

Views

Solving the PDE $x_{1}\dfrac{\partial f}{\partial x_{1}}+x_{2}\dfrac{\partial f}{\partial x_{2}}=e^{f(x_{1},x_{2})}-\alpha.$

Published on 01 Apr 2026 - 20:42

score 44 · Answer 6 · 2026-04-13 05:05:17

44

Views

Inner product involving the complex conjugate of a function

Published on 13 Apr 2026 - 5:05

score 186 · Answer 7 · 2026-04-11 02:58:30

186

Views

Fourier coefficients of a "shifted" periodic function

Published on 11 Apr 2026 - 2:58

score 68 · Answer 8 · 2026-04-01 20:40:50

68

Views

Show that the operators given by convolution with the $\sin t / t$ and the distribution p.v. $\cos t / t$ are bounded on $L^{p}(\mathbb{R})$

Published on 01 Apr 2026 - 20:40

score 102 · Answer 9 · 2026-04-01 20:38:59

102

Views

Let $f \in L^{2}(\mathbb{R}), x f \in L^{2}(\mathbb{R})$ and $\int_{\mathbb{R}} f(x) d x=0 .$ To show that $H f \in L^{1}(\mathbb{R})$

Published on 01 Apr 2026 - 20:38

score 39 · Answer 10 · 2026-04-10 11:52:00

39

Views

Order of growth for real sequences

Published on 10 Apr 2026 - 11:52

score 47 · Answer 11 · 2026-04-11 07:58:38

47

Views

Convolution properties gives unequal expressions

Published on 11 Apr 2026 - 7:58

score 65 · Answer 12 · 2026-03-25 11:16:51

65

Views

Decay of Fourier transform of measure on enlarged set

Published on 25 Mar 2026 - 11:16

score 185 · Answer 13 · 2026-04-12 00:30:20

185

Views

Typo in formula for Fourier transform of translation / modulation of a tempered distribution?

Published on 12 Apr 2026 - 0:30

score 48 · Answer 14 · 2026-04-09 17:43:45

48

Views

Can the "frequency" in the Fourier form of the Delta function ever be complex?

Published on 09 Apr 2026 - 17:43

score 454 · Answer 15 · 2020-03-27 03:06:46

454

Views

Show $\sum_{n=-\infty}^{\infty} \frac{1}{(n+\alpha)^2} = \frac{\pi^2}{(\sin\pi\alpha)^2}$

Published on 27 Mar 2020 - 3:06

List Question

A proof about approximations in L1

Having trouble understanding why the dot product of e^(pi*i) and the conjugate of its derivative does not equal 0?

Inequality for Fourier transform $\mathcal{F}(f)$

What is the DFT of $x(2n)$ if you know the DFT of $x(n)$?

Solving the PDE $x_{1}\dfrac{\partial f}{\partial x_{1}}+x_{2}\dfrac{\partial f}{\partial x_{2}}=e^{f(x_{1},x_{2})}-\alpha.$

Inner product involving the complex conjugate of a function

Fourier coefficients of a "shifted" periodic function

Show that the operators given by convolution with the $\sin t / t$ and the distribution p.v. $\cos t / t$ are bounded on $L^{p}(\mathbb{R})$

Let $f \in L^{2}(\mathbb{R}), x f \in L^{2}(\mathbb{R})$ and $\int_{\mathbb{R}} f(x) d x=0 .$ To show that $H f \in L^{1}(\mathbb{R})$

Order of growth for real sequences

Convolution properties gives unequal expressions

Decay of Fourier transform of measure on enlarged set

Typo in formula for Fourier transform of translation / modulation of a tempered distribution?

Can the "frequency" in the Fourier form of the Delta function ever be complex?

Show $\sum_{n=-\infty}^{\infty} \frac{1}{(n+\alpha)^2} = \frac{\pi^2}{(\sin\pi\alpha)^2}$

Trending Questions

Popular # Hahtags

Popular Questions