List questions from operator-theory

Published on 31 May 2019 - 6:22

85

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Showing that $(Ax)(t) = x'(t)$ is a Fredholm operator

Published on 26 Mar 2026 - 1:15

524

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A weakly continuous semigroup of operators on a Banach Space is Strongly Continuous

Published on 25 Mar 2026 - 12:43

54

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If $E^\ast$ is the one-point compactification of $E$, can we identify a contraction semigroup on $C_0(E)$ with a contraction semigroup on $C(E^\ast)$?

Published on 25 Mar 2026 - 12:38

72

Views

Injective Weighted Shft Operator

Published on 02 Jun 2019 - 17:13

589

Views

Calculate the operator norm of $A: L^2[0,1] \to L^2[0,1]$ defined by $(Af)(x):=i\int_0^x f(t)\,dt-\frac{i}{2} \int_0^1 f(t) \,dt$

Published on 25 Mar 2026 - 7:46

306

Views

Proving that positive linear maps from or to C(X) are completely positive

Published on 27 Mar 2026 - 16:22

209

Views

Position representation of an operator

Published on 26 Mar 2026 - 16:10

44

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support projection of a sum of positive operators

Published on 27 Mar 2026 - 17:52

288

Views

On the connections between the spectral theorem and functional calculus for normal operators.

Published on 23 Feb 2026 - 4:55

158

Views

The second dual of a von Neumann algebra

Published on 26 Mar 2026 - 16:56

155

Views

An example of a non unitary isometry on $L^2(\mathbb{R})$?

Published on 06 Jun 2019 - 14:25

78

Views

Inequality related to the norm of operator

Published on 30 Mar 2026 - 15:05

37

Views

When is a weak topology Baire?

Published on 25 Mar 2026 - 23:19

337

Views

Multipliers and corners of $C^*$-algebras

Published on 27 Mar 2026 - 17:52

List Question

Matrix transformation and boundedness

Showing that $(Ax)(t) = x'(t)$ is a Fredholm operator

A weakly continuous semigroup of operators on a Banach Space is Strongly Continuous

If $E^\ast$ is the one-point compactification of $E$, can we identify a contraction semigroup on $C_0(E)$ with a contraction semigroup on $C(E^\ast)$?

Injective Weighted Shft Operator

Calculate the operator norm of $A: L^2[0,1] \to L^2[0,1]$ defined by $(Af)(x):=i\int_0^x f(t)\,dt-\frac{i}{2} \int_0^1 f(t) \,dt$

Proving that positive linear maps from or to C(X) are completely positive

Position representation of an operator

support projection of a sum of positive operators

On the connections between the spectral theorem and functional calculus for normal operators.

The second dual of a von Neumann algebra

An example of a non unitary isometry on $L^2(\mathbb{R})$?

Inequality related to the norm of operator

When is a weak topology Baire?

Multipliers and corners of $C^*$-algebras

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