List questions from operator-theory

Published on 10 Apr 2026 - 9:08

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Does convergence for increasing sequences of projections imply convergence for all sequences of projections?

Published on 26 Mar 2026 - 18:50

33

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Find the operator P(x,y,z)

Published on 29 Mar 2026 - 4:01

153

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Class of Fourier multiplier in $L^1$ is the class of Fourier transform of finite Borel measures. (Stein)

Published on 11 Apr 2026 - 7:45

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Prove that finite difference operator is commutative

Published on 17 Nov 2019 - 8:32

46

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Why $\lim_{n\rightarrow\infty} \mbox{Re}(T_1\xi_n\mid \lambda T_2\xi_n)=\lim_{n\rightarrow\infty} (T_1\xi_n\mid \lambda T_2\xi_n)$?

Published on 17 Nov 2019 - 11:47

61

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Construct a vector so the operator inequality $\|Av\|_1 \le \|A\|_1 \|v\|_1$ is equal

Published on 17 Nov 2019 - 13:13

138

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Showing that $\lambda$ is an eigenvalue iff $\mathbb{1}_{\left\{\lambda\right\}} (T)$ is non-zero

Published on 17 Nov 2019 - 13:36

33

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Capacity limitations

Published on 10 Apr 2026 - 18:36

108

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How do we define the norm of a block operator matrix?

Published on 10 Apr 2026 - 3:43

44

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existence of eigenfunctions in non-self adjoint operator

Published on 27 Mar 2026 - 3:49

182

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Example of a strongly dense set which is not ultrastrongly dense.

Published on 11 Apr 2026 - 9:25

46

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Is there a Deterministic Matrix with Restricted Isometry Property?

Published on 10 Apr 2026 - 9:05

100

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Norm of adjoint of operator of $l_1$

Published on 27 Mar 2026 - 3:43

234

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Trace norm of partial trace of unitary transformation

Published on 09 Apr 2026 - 8:10

List Question

Eigenvalue of Hermitian operator(curl) complex?

Does convergence for increasing sequences of projections imply convergence for all sequences of projections?

Find the operator P(x,y,z)

Class of Fourier multiplier in $L^1$ is the class of Fourier transform of finite Borel measures. (Stein)

Prove that finite difference operator is commutative

Why $\lim_{n\rightarrow\infty} \mbox{Re}(T_1\xi_n\mid \lambda T_2\xi_n)=\lim_{n\rightarrow\infty} (T_1\xi_n\mid \lambda T_2\xi_n)$?

Construct a vector so the operator inequality $\|Av\|_1 \le \|A\|_1 \|v\|_1$ is equal

Showing that $\lambda$ is an eigenvalue iff $\mathbb{1}_{\left\{\lambda\right\}} (T)$ is non-zero

Capacity limitations

How do we define the norm of a block operator matrix?

existence of eigenfunctions in non-self adjoint operator

Example of a strongly dense set which is not ultrastrongly dense.

Is there a Deterministic Matrix with Restricted Isometry Property?

Norm of adjoint of operator of $l_1$

Trace norm of partial trace of unitary transformation

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