List questions from spectral-theory

Published on 11 Apr 2026 - 8:12

62

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Invertible transformations in $C[0,1]$ for spectral theory

Published on 15 Jan 2023 - 20:25

31

Views

Upper Bound for inverse selfadjoint operator between Hilbert space

Published on 11 Apr 2026 - 22:13

178

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Character Space of $C^1[0,1]$ and Gelfand Representation

Published on 09 Apr 2026 - 11:21

72

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$\operatorname{Sp}(a^{}) = \operatorname{Sp}(a)^{}$ and the spectrum of a positive element

Published on 16 Jan 2023 - 21:28

108

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Is the $n/2$-th heat kernel coefficient topological?

Published on 12 Apr 2026 - 11:56

31

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How to prove that a function is unitarily invariant

Published on 12 Apr 2026 - 1:34

45

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Homotopy between Unitary with gap in spectrum

Published on 09 Apr 2026 - 21:35

166

Views

What does "spectral representation of a Gaussian Process" mean?

Published on 11 Apr 2026 - 8:13

39

Views

Quartic energy minimization vs Sturm-Liouville Theory

Published on 12 Apr 2026 - 15:06

120

Views

Spectrum of operator : $Tf(x)=\dfrac{f(x)+f(-x)}{2}$

Published on 23 Jan 2023 - 19:13

93

Views

Eigenfunction of $\Delta$ in $L^2(\mathbb{R}^d)$

Published on 29 Mar 2026 - 3:52

52

Views

Continuous spectrum vs (Lax) Continuous spectrum

Published on 10 Apr 2026 - 11:24

List Question

Power Transformation of a Spectral Density Function

Invertible transformations in $C[0,1]$ for spectral theory

Upper Bound for inverse selfadjoint operator between Hilbert space

Character Space of $C^1[0,1]$ and Gelfand Representation

$\operatorname{Sp}(a^{}) = \operatorname{Sp}(a)^{}$ and the spectrum of a positive element

Is the $n/2$-th heat kernel coefficient topological?

How to prove that a function is unitarily invariant

Homotopy between Unitary with gap in spectrum

What does "spectral representation of a Gaussian Process" mean?

Quartic energy minimization vs Sturm-Liouville Theory

Spectrum of operator : $Tf(x)=\dfrac{f(x)+f(-x)}{2}$

Eigenfunction of $\Delta$ in $L^2(\mathbb{R}^d)$

Continuous spectrum vs (Lax) Continuous spectrum

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