List questions from operator-theory

Published on 06 Mar 2019 - 18:32

210

Views

Special elements in the $C^*$ algebra $A \otimes \mathcal{K}$.

Published on 25 Mar 2026 - 1:22

47

Views

Toeplitz Operators on Weighted Dirichlet Spaces $\mathcal{D}_\beta$

Published on 24 Feb 2026 - 1:33

653

Views

$T=AU \iff T $ is a normal operator on Hilbert space

Published on 26 Mar 2026 - 13:57

375

Views

Can you have a weakly convergent sequence of unbounded linear operators? (Example)

Published on 25 Mar 2026 - 11:11

160

Views

Showing an linear operator is bounded

Published on 28 Mar 2026 - 16:12

449

Views

Commutativity of trace norm

Published on 11 Mar 2019 - 19:47

311

Views

Spectrum of non-invertible operator

Published on 11 Mar 2019 - 21:15

785

Views

Commuting operators in a Projection

Published on 12 Mar 2019 - 10:41

473

Views

Is the limit of the spectral radius the spectral radius of the limit?

Published on 25 Mar 2026 - 21:54

32

Views

Bijection+Closability?

Published on 12 Mar 2019 - 20:21

795

Views

Examples of non-unitary isometries on finite dimensional Hilbert spaces?

Published on 25 Mar 2026 - 12:54

235

Views

On self adjoint operator having discrete spectrum

Published on 26 Mar 2026 - 17:29

88

Views

Computing the inner product $(\chi_{R},\chi_{R})$.

Published on 30 Mar 2026 - 3:53

104

Views

If $A \in \mathcal{L}(H)$ and $\langle A(u),u \rangle \geq \langle u, u \rangle$, then $A$ is invertible.

Published on 26 Mar 2026 - 11:02

List Question

Showing the following linear operator is bounded

Special elements in the $C^*$ algebra $A \otimes \mathcal{K}$.

Toeplitz Operators on Weighted Dirichlet Spaces $\mathcal{D}_\beta$

$T=AU \iff T $ is a normal operator on Hilbert space

Can you have a weakly convergent sequence of unbounded linear operators? (Example)

Showing an linear operator is bounded

Commutativity of trace norm

Spectrum of non-invertible operator

Commuting operators in a Projection

Is the limit of the spectral radius the spectral radius of the limit?

Bijection+Closability?

Examples of non-unitary isometries on finite dimensional Hilbert spaces?

On self adjoint operator having discrete spectrum

Computing the inner product $(\chi_{R},\chi_{R})$.

If $A \in \mathcal{L}(H)$ and $\langle A(u),u \rangle \geq \langle u, u \rangle$, then $A$ is invertible.

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