Question

Lower bound via Sobolev Inequality

score 90 · Answer 1 · 2026-03-30 09:53:49

90

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Lower bound via Sobolev Inequality

Published on 30 Mar 2026 - 9:53

score 198 · Answer 2 · 2026-04-07 21:22:40

198

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Linear mappings between two Sets

Published on 07 Apr 2026 - 21:22

score 43 · Answer 3 · 2021-05-13 10:40:49

43

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If $1=\frac{1}{2}(x+y)$ for $x,y\in A_{sa}$ then $x$ and $y$ commute by spectral theory

Published on 13 May 2021 - 10:40

score 90 · Answer 4 · 2021-05-13 22:52:04

90

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Does a completely arbitrary unbounded operator in a separable Hilbert space have a spectrum?

Published on 13 May 2021 - 22:52

score 61 · Answer 5 · 2021-05-14 18:33:36

61

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Finding spectral radius if $T^*T$ where $Tf=\int_0^t f(s)ds$

Published on 14 May 2021 - 18:33

score 145 · Answer 6 · 2026-03-31 12:13:03

145

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Convergence of eigenvalues in Hilbert-Schmidt norm

Published on 31 Mar 2026 - 12:13

score 38 · Answer 7 · 2021-05-16 11:58:19

38

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Find $A\subset\mathcal{B[(0,1)]}$ such that $\lvert{\mu}\rvert(A) \neq \lvert\mu(A)\rvert $

Published on 16 May 2021 - 11:58

score 108 · Answer 8 · 2026-03-25 17:31:31

108

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How to analyze the differences between experimental and theoretical data.

Published on 25 Mar 2026 - 17:31

score 289 · Answer 9 · 2026-03-27 00:05:20

289

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Show that the Cayley transform of a bounded self-adjoint operator on a Hilbert space has the number 1 in its resolvent.

Published on 27 Mar 2026 - 0:05

score 46 · Answer 10 · 2026-03-29 12:52:52

46

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Regular Perturbation theory for $L=L_0+\epsilon ix$, where $L_0$ is an unbounded self-adjoint operator, on $\mathbb R$

Published on 29 Mar 2026 - 12:52

score 56 · Answer 11 · 2026-03-25 19:25:35

56

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Suitable choices of base functions for periodic signals using Koopman approximation

Published on 25 Mar 2026 - 19:25

score 73 · Answer 12 · 2026-02-24 08:17:39

73

Views

Absolute continuity and Titchmarsh-Kodaira theorem

Published on 24 Feb 2026 - 8:17

score 1.1k · Answer 13 · 2026-04-08 12:48:06

1.1k

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Finding the spectral decomposition of a given $3\times 3$ matrix

Published on 08 Apr 2026 - 12:48

score 45 · Answer 14 · 2021-05-25 17:23:58

45

Views

How to prove that a positive stochastic matrix has the maximal eigenvalue to be 1 from Perron-Frobenius?

Published on 25 May 2021 - 17:23

score 41 · Answer 15 · 2021-05-26 14:32:47

41

Views

If H is hilbert space and $T\in B(H)$ normal then $(g\circ f)(T)=g(f(T)$

Published on 26 May 2021 - 14:32

List Question

Lower bound via Sobolev Inequality

Linear mappings between two Sets

If $1=\frac{1}{2}(x+y)$ for $x,y\in A_{sa}$ then $x$ and $y$ commute by spectral theory

Does a completely arbitrary unbounded operator in a separable Hilbert space have a spectrum?

Finding spectral radius if $T^*T$ where $Tf=\int_0^t f(s)ds$

Convergence of eigenvalues in Hilbert-Schmidt norm

Find $A\subset\mathcal{B[(0,1)]}$ such that $\lvert{\mu}\rvert(A) \neq \lvert\mu(A)\rvert $

How to analyze the differences between experimental and theoretical data.

Show that the Cayley transform of a bounded self-adjoint operator on a Hilbert space has the number 1 in its resolvent.

Regular Perturbation theory for $L=L_0+\epsilon ix$, where $L_0$ is an unbounded self-adjoint operator, on $\mathbb R$

Suitable choices of base functions for periodic signals using Koopman approximation

Absolute continuity and Titchmarsh-Kodaira theorem

Finding the spectral decomposition of a given $3\times 3$ matrix

How to prove that a positive stochastic matrix has the maximal eigenvalue to be 1 from Perron-Frobenius?

If H is hilbert space and $T\in B(H)$ normal then $(g\circ f)(T)=g(f(T)$

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