List questions from operator-theory

Published on 09 Apr 2026 - 4:25

208

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What is the image of Laplace transform given domain $\mathcal{D}$

Published on 15 Apr 2026 - 3:45

190

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How Much Abstract Algebra Do I Really Need to Know for Operator Theory/Algebras

Published on 08 Apr 2026 - 3:20

67

Views

Equation doesn't seem to fit one of the cross product properties

Published on 11 Apr 2026 - 19:12

355

Views

Does Continuous diffentiablity imply Lipschitz continuity in Banach space?

Published on 26 Mar 2026 - 1:14

275

Views

$L$ is an elliptic operator?

Published on 10 Apr 2026 - 3:16

1.4k

Views

equality of norm and numerical radius for normal (or even self-adjoint) operators on Hilbert space

Published on 14 Apr 2026 - 22:16

88

Views

$ \left\langle Av,v \right\rangle =0\;\forall v\implies A=0$ confusion

Published on 15 Apr 2026 - 2:49

66

Views

Point of proving operators are bounded

Published on 24 Apr 2026 - 3:34

42

Views

Ellipticity of an unbounded operator $L$

Published on 11 Apr 2026 - 5:13

76

Views

When is $x\otimes y^\ast$ positive definite?

Published on 11 Apr 2026 - 1:05

587

Views

Operator norm of product of matrices

Published on 18 Apr 2026 - 16:29

103

Views

If $\lambda, \delta \in \widehat{G}$, where $G$ is compact abelian and $A$ is ergodic, then $(U_A^n \lambda, \delta) = 0$ eventually

Published on 16 Apr 2026 - 7:27

103

Views

Why is $l^2$ space needed in definition of weighted shift?

Published on 11 Apr 2026 - 18:09

130

Views

Approximating a nonlinear operator $T:X \to Y$ between Banach spaces by smoother operators

Published on 11 Apr 2026 - 12:52

List Question

Closed Range Convolution Operator

What is the image of Laplace transform given domain $\mathcal{D}$

How Much Abstract Algebra Do I Really Need to Know for Operator Theory/Algebras

Equation doesn't seem to fit one of the cross product properties

Does Continuous diffentiablity imply Lipschitz continuity in Banach space?

$L$ is an elliptic operator?

equality of norm and numerical radius for normal (or even self-adjoint) operators on Hilbert space

$ \left\langle Av,v \right\rangle =0\;\forall v\implies A=0$ confusion

Point of proving operators are bounded

Ellipticity of an unbounded operator $L$

When is $x\otimes y^\ast$ positive definite?

Operator norm of product of matrices

If $\lambda, \delta \in \widehat{G}$, where $G$ is compact abelian and $A$ is ergodic, then $(U_A^n \lambda, \delta) = 0$ eventually

Why is $l^2$ space needed in definition of weighted shift?

Approximating a nonlinear operator $T:X \to Y$ between Banach spaces by smoother operators

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