List questions from operator-theory

Published on 25 Mar 2026 - 11:00

953

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Proving that the set of continuous linear maps (From a Banach space $X$ to another Banach space $Y$) is an open subset of $L(X,Y)$

Published on 29 Mar 2026 - 10:49

45

Views

Decomposition of an unbounded operator

Published on 27 Mar 2026 - 11:46

221

Views

How can we proof this implication in Corollary 4.8.7 in the book of Ethier and Kurtz?

Published on 25 Mar 2026 - 11:04

252

Views

Momentum operator in the position basis

Published on 27 Mar 2026 - 20:27

99

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Linear operator in banach spaces: multiplication of open balls by positive scalar

Published on 29 Mar 2026 - 9:11

44

Views

sum of ideals in $C^*$ algebra

Published on 27 Mar 2026 - 15:07

580

Views

Sum of closed and bounded linear operators

Published on 20 May 2019 - 23:56

95

Views

Convergence of Feller processes implies convergence of the resolvent operators of their generators

Published on 27 Mar 2026 - 1:47

829

Views

What's the difference between the operator norm and the sup norm

Published on 21 May 2019 - 14:50

44

Views

Generalized Laplacian?

Published on 21 May 2019 - 15:13

64

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Showing that $\alpha\geq \beta$

Published on 27 Mar 2026 - 22:59

72

Views

Kronecker product on a matrix with structured blocks

Published on 25 Mar 2026 - 9:34

93

Views

Find the norm of this operator

Published on 27 Mar 2026 - 10:09

206

Views

When does a multiplication operator on $L^2$ have closed range?

Published on 22 May 2019 - 13:33

List Question

$L^p$-contractivity implies $L^p$-dissipativity?

Proving that the set of continuous linear maps (From a Banach space $X$ to another Banach space $Y$) is an open subset of $L(X,Y)$

Decomposition of an unbounded operator

How can we proof this implication in Corollary 4.8.7 in the book of Ethier and Kurtz?

Momentum operator in the position basis

Linear operator in banach spaces: multiplication of open balls by positive scalar

sum of ideals in $C^*$ algebra

Sum of closed and bounded linear operators

Convergence of Feller processes implies convergence of the resolvent operators of their generators

What's the difference between the operator norm and the sup norm

Generalized Laplacian?

Showing that $\alpha\geq \beta$

Kronecker product on a matrix with structured blocks

Find the norm of this operator

When does a multiplication operator on $L^2$ have closed range?

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