Question

Finding spectrum of given operator

score 811 · Answer 1 · 2026-05-10 12:30:52

811

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Finding spectrum of given operator

Published on 10 May 2026 - 12:30

score 140 · Answer 2 · 2026-04-29 12:27:43

140

Views

Books on ergodic operators

Published on 29 Apr 2026 - 12:27

score 107 · Answer 3 · 2026-05-10 16:01:08

107

Views

Explain a proof from a paper: why the inequality $b<\|A\|$ is strict?

Published on 10 May 2026 - 16:01

score 92 · Answer 4 · 2026-05-10 13:28:10

92

Views

Is the map $T: C(X) \to \mathbb{B}(L^2(X,\nu))$ defined by $T(f)=M_f$, where $M_f(g)=fg$, injective?

Published on 10 May 2026 - 13:28

score 1.3k · Answer 5 · 2026-04-12 02:12:35

1.3k

Views

Singular value decomposition of a compact operator, using matrix notation

Published on 12 Apr 2026 - 2:12

score 63 · Answer 6 · 2026-05-10 14:07:30

63

Views

Is : $\frac{dx}{\partial{x}}=1$ and what does it mean :$\frac{{\partial}}{d}$ or $ \frac{d}{\partial} $?

Published on 10 May 2026 - 14:07

score 250 · Answer 7 · 2026-05-03 03:58:10

250

Views

Checking the well-definedness of an adjoint operator

Published on 03 May 2026 - 3:58

score 55 · Answer 8 · 2026-05-10 13:28:10

55

Views

Conditions such that $f\leq g$ implies $FourierSeries(f)\leq FourierSeries(g)$

Published on 10 May 2026 - 13:28

score 84 · Answer 9 · 2026-05-10 10:12:35

84

Views

Vector-valued functionals?

Published on 10 May 2026 - 10:12

score 88 · Answer 10 · 2026-05-10 13:51:18

88

Views

Calculate the spectra for $T: l_2(\mathbb{N}) \to l_2(\mathbb{N})$ defined by $Tx = \left( \frac{n-1}{n+1} x_n \right)_{n}$

Published on 10 May 2026 - 13:51

score 810 · Answer 11 · 2026-05-10 15:00:37

810

Views

Why denote the spectral decomposition of a bounded operator as an integral?

Published on 10 May 2026 - 15:00

score 141 · Answer 12 · 2026-05-10 12:11:14

141

Views

Characterizing families of $p^2$ orthogonal $p \times p$ unitaries?

Published on 10 May 2026 - 12:11

score 69 · Answer 13 · 2026-05-10 17:02:47

69

Views

Norm of linear operator $T(f) = \pi \int_0^{\pi} f(x)\,dx + i/2 \int_\pi^{2\pi} f(x)/x \,dx$

Published on 10 May 2026 - 17:02

score 155 · Answer 14 · 2026-05-10 17:00:20

155

Views

Non-continuous linear functional over polynomials with inner product $\langle f,g \rangle = \int_{0}^{1} f(x)g(x)dx$

Published on 10 May 2026 - 17:00

score 95 · Answer 15 · 2026-05-05 04:13:10

95

Views

An embedding from the $C(X) \rtimes_{\alpha,r}\Gamma$ into $L^{\infty}(X) \ltimes \Gamma$.

Published on 05 May 2026 - 4:13

List Question

Finding spectrum of given operator

Books on ergodic operators

Explain a proof from a paper: why the inequality $b<\|A\|$ is strict?

Is the map $T: C(X) \to \mathbb{B}(L^2(X,\nu))$ defined by $T(f)=M_f$, where $M_f(g)=fg$, injective?

Singular value decomposition of a compact operator, using matrix notation

Is : $\frac{dx}{\partial{x}}=1$ and what does it mean :$\frac{{\partial}}{d}$ or $ \frac{d}{\partial} $?

Checking the well-definedness of an adjoint operator

Conditions such that $f\leq g$ implies $FourierSeries(f)\leq FourierSeries(g)$

Vector-valued functionals?

Calculate the spectra for $T: l_2(\mathbb{N}) \to l_2(\mathbb{N})$ defined by $Tx = \left( \frac{n-1}{n+1} x_n \right)_{n}$

Why denote the spectral decomposition of a bounded operator as an integral?

Characterizing families of $p^2$ orthogonal $p \times p$ unitaries?

Norm of linear operator $T(f) = \pi \int_0^{\pi} f(x)\,dx + i/2 \int_\pi^{2\pi} f(x)/x \,dx$

Non-continuous linear functional over polynomials with inner product $\langle f,g \rangle = \int_{0}^{1} f(x)g(x)dx$

An embedding from the $C(X) \rtimes_{\alpha,r}\Gamma$ into $L^{\infty}(X) \ltimes \Gamma$.

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