List questions from hilbert-spaces

Published on 16 May 2019 - 10:45

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What is $\ell^2(\Gamma)$ for a discrete group $\Gamma$?

Published on 17 May 2019 - 16:16

54

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Construction of an operator $A$ on $\ell^2(\mathbb{N}^*)$ satisfying a property

Published on 18 May 2019 - 15:56

45

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Decomposition of an unbounded operator

Published on 27 Mar 2026 - 11:46

252

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Momentum operator in the position basis

Published on 27 Mar 2026 - 20:27

779

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Every surjective isometry on a Hilbert space is indeed a unitary operator

Published on 25 Mar 2026 - 17:45

156

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Right Hilbert space for a duality pairing

Published on 25 Mar 2026 - 5:05

52

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Equivalence of statements about bounded linear maps on a Hilbert space

Published on 25 Mar 2026 - 20:42

44

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Non-expansiveness implies strict pseudo‑contraction in a Hilbert space

Published on 21 May 2019 - 8:39

153

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Corollary of Projection onto a closed convex set and geometric interpretation

Published on 25 Mar 2026 - 20:36

434

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$\mathcal{F}$ convex and lower continuous $\Rightarrow$ $\mathcal{F}$ weakly lower continuous

Published on 29 Mar 2026 - 11:43

186

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Is the lattice of subspaces of a finite-dimensional scalar product space distributive?

Published on 25 Mar 2026 - 17:20

35

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How can I show that the subset of $L^2(-a, a)$ of the functions with mean value 0 is Hilbert?

Published on 26 Mar 2026 - 1:29

22

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Strictly pseudo-contraction maps on bounded subsets of a Hilbert space are bounded.

Published on 23 May 2019 - 11:33

735

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Proximal normal cone and convex sets

Published on 25 Mar 2026 - 9:31

List Question

What are the eigenstates of $X^N$ operator?

What is $\ell^2(\Gamma)$ for a discrete group $\Gamma$?

Construction of an operator $A$ on $\ell^2(\mathbb{N}^*)$ satisfying a property

Decomposition of an unbounded operator

Momentum operator in the position basis

Every surjective isometry on a Hilbert space is indeed a unitary operator

Right Hilbert space for a duality pairing

Equivalence of statements about bounded linear maps on a Hilbert space

Non-expansiveness implies strict pseudo‑contraction in a Hilbert space

Corollary of Projection onto a closed convex set and geometric interpretation

$\mathcal{F}$ convex and lower continuous $\Rightarrow$ $\mathcal{F}$ weakly lower continuous

Is the lattice of subspaces of a finite-dimensional scalar product space distributive?

How can I show that the subset of $L^2(-a, a)$ of the functions with mean value 0 is Hilbert?

Strictly pseudo-contraction maps on bounded subsets of a Hilbert space are bounded.

Proximal normal cone and convex sets

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