Question

Two ways of discretizing an operator on $\mathbb{R}$ for computing spectrum: Similarities and Differences

score 57 · Answer 1 · 2017-05-07 20:17:51

57

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Two ways of discretizing an operator on $\mathbb{R}$ for computing spectrum: Similarities and Differences

Published on 07 May 2017 - 20:17

score 75 · Answer 2 · 2017-05-08 13:09:54

75

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Characterisation of $\left(-\frac{d^2}{dx^2}\right)^{1/2}$

Published on 08 May 2017 - 13:09

score 213 · Answer 3 · 2017-05-08 21:04:48

213

Views

Direct computation of continuous spectrum for differential operator

Published on 08 May 2017 - 21:04

score 905 · Answer 4 · 2017-05-09 10:31:11

905

Views

T is a bounded operator on a Hilbert Space satisfying $|\langle Tx,x \rangle| \geq ||x||^{2}$ doesn't have $0$ in its spectrum

Published on 09 May 2017 - 10:31

score 1.8k · Answer 5 · 2017-05-09 14:46:06

1.8k

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The spectrum of a bounded linear operator on a $X=C[0;1]$

Published on 09 May 2017 - 14:46

score 1k · Answer 6 · 2026-03-29 06:36:38

1k

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Simultaneous diagonlisation of two quadratic forms, one of which is positive definite

Published on 29 Mar 2026 - 6:36

score 123 · Answer 7 · 2026-02-24 02:13:57

123

Views

Being Close to a Unitary in a C$^{}$-algebra Implies Being Close to a Unitary in a Sub-C$^{}$-Algebra

Published on 24 Feb 2026 - 2:13

score 33 · Answer 8 · 2017-05-11 13:31:11

33

Views

Vector function represented with matrix numerical range

Published on 11 May 2017 - 13:31

score 34 · Answer 9 · 2026-04-02 14:44:55

34

Views

Natural processes are superpositions of harmonics?

Published on 02 Apr 2026 - 14:44

score 46 · Answer 10 · 2017-05-14 10:40:26

46

Views

Is this an OK proof to show that eigenvectors of a symmetric matrix are orthogonal?

Published on 14 May 2017 - 10:40

score 371 · Answer 11 · 2026-03-28 10:16:42

371

Views

The spectrum of an unbounded differential operator on $C (\mathbb{R}^+)$

Published on 28 Mar 2026 - 10:16

score 108 · Answer 12 · 2017-05-15 20:18:47

108

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Spectral properties of infinite dimensional Hermitian matrices

Published on 15 May 2017 - 20:18

score 242 · Answer 13 · 2017-05-16 22:31:08

242

Views

In $\ell^2(\mathbb{Z})$, using Fourier coefficients calculate the spectrum of the right-shift operator?

Published on 16 May 2017 - 22:31

score 148 · Answer 14 · 2026-03-29 22:43:35

148

Views

Sequence of isometries with mutually orthogonal ranges

Published on 29 Mar 2026 - 22:43

score 258 · Answer 15 · 2017-05-19 03:24:16

258

Views

Let $a\in C[0,1]$ and $A:C[0,1]\rightarrow C[0,1]$ where $A(x)(t)=a(t)x(t).$ Find $\sigma_{p}$, $\sigma_{c}$, $\sigma_{r}$.

Published on 19 May 2017 - 3:24

List Question

Two ways of discretizing an operator on $\mathbb{R}$ for computing spectrum: Similarities and Differences

Characterisation of $\left(-\frac{d^2}{dx^2}\right)^{1/2}$

Direct computation of continuous spectrum for differential operator

T is a bounded operator on a Hilbert Space satisfying $|\langle Tx,x \rangle| \geq ||x||^{2}$ doesn't have $0$ in its spectrum

The spectrum of a bounded linear operator on a $X=C[0;1]$

Simultaneous diagonlisation of two quadratic forms, one of which is positive definite

Being Close to a Unitary in a C$^{}$-algebra Implies Being Close to a Unitary in a Sub-C$^{}$-Algebra

Vector function represented with matrix numerical range

Natural processes are superpositions of harmonics?

Is this an OK proof to show that eigenvectors of a symmetric matrix are orthogonal?

The spectrum of an unbounded differential operator on $C (\mathbb{R}^+)$

Spectral properties of infinite dimensional Hermitian matrices

In $\ell^2(\mathbb{Z})$, using Fourier coefficients calculate the spectrum of the right-shift operator?

Sequence of isometries with mutually orthogonal ranges

Let $a\in C[0,1]$ and $A:C[0,1]\rightarrow C[0,1]$ where $A(x)(t)=a(t)x(t).$ Find $\sigma_{p}$, $\sigma_{c}$, $\sigma_{r}$.

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