List questions from hilbert-spaces

Published on 20 Jan 2019 - 13:40

29

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Counting Balls in $L^2_m[0,1]$

Published on 22 Mar 2026 - 9:34

510

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orthonormal basis of infinite dimensional Hilbert space H is not a basis of H as vector space?

Published on 26 Mar 2026 - 1:25

109

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The importance of estimates of frame bounds.

Published on 25 Mar 2026 - 14:07

51

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Norm of Fourier series

Published on 25 Mar 2026 - 23:38

67

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Several Questions about Hilbert Manifold

Published on 28 Mar 2026 - 12:34

134

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If an operator $T$ satisfy a property, then $\|Tx\|=c\|x\|$

Published on 22 Jan 2019 - 9:37

239

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$l_2(S)$is a hilbert space where S is a subset

Published on 22 Jan 2019 - 13:41

96

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Is the "tensoring map" from $\mathcal{H}_1 \times \mathcal{H}_2$ to $\mathcal{H}_1 \otimes \mathcal{H}_2$ a continuous map?

Published on 22 Jan 2019 - 14:52

370

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Show that $A:\ell^2(\mathbb N)\to\ell^2(\mathbb N)$ where $A(e_n)=\lambda_ne_n$ is bounded.

Published on 22 Jan 2019 - 16:54

26

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Is it possible for a solution of a nonlinear differential equation to be written as a sum of linear basis functions in a Hilbert Space?

Published on 23 Jan 2019 - 2:16

297

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Is there a "practical" Hilbert space of stochastic processes?

Published on 23 Jan 2019 - 5:29

467

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Convergence in a Hilbert Space

Published on 23 Jan 2019 - 5:59

161

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$H$ is a Hilbert space , then each orthonormal basis of $H$ has the same cardinality

Published on 23 Jan 2019 - 15:22

130

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Inner product on a sequence and its limit

Published on 28 Mar 2026 - 7:57

List Question

Question about inner product of $C_{2}[a,b]$.

Counting Balls in $L^2_m[0,1]$

orthonormal basis of infinite dimensional Hilbert space H is not a basis of H as vector space?

The importance of estimates of frame bounds.

Norm of Fourier series

Several Questions about Hilbert Manifold

If an operator $T$ satisfy a property, then $\|Tx\|=c\|x\|$

$l_2(S)$is a hilbert space where S is a subset

Is the "tensoring map" from $\mathcal{H}_1 \times \mathcal{H}_2$ to $\mathcal{H}_1 \otimes \mathcal{H}_2$ a continuous map?

Show that $A:\ell^2(\mathbb N)\to\ell^2(\mathbb N)$ where $A(e_n)=\lambda_ne_n$ is bounded.

Is it possible for a solution of a nonlinear differential equation to be written as a sum of linear basis functions in a Hilbert Space?

Is there a "practical" Hilbert space of stochastic processes?

Convergence in a Hilbert Space

$H$ is a Hilbert space , then each orthonormal basis of $H$ has the same cardinality

Inner product on a sequence and its limit

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