List questions from operator-theory

Published on 26 Mar 2026 - 11:02

278

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Condition for an operator to have closed Image

Published on 12 Apr 2026 - 14:43

280

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Find the spectrum of a linear bounded operator $T:L^1([0,1]) \longrightarrow L^1([0,1])$

Published on 16 Apr 2026 - 5:39

69

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Definition p-multigraded Hilbert spaces

Published on 25 Mar 2026 - 20:41

107

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Bounded linear operator of $\ell^{2}(\mathbb{N})$ which is normal but not self-adjoint

Published on 27 Mar 2026 - 16:16

51

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Compute norm of linear functional over $c_0$

Published on 14 Apr 2026 - 9:45

69

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Is it true that $I \otimes J$ is ideal of $A \otimes B$?

Published on 13 Apr 2026 - 0:32

118

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BCH formula for unbounded self-adjoint formula

Published on 09 Apr 2026 - 19:01

111

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Separability of group $C^*$-algebras

Published on 16 Apr 2026 - 4:03

143

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Closed graph theorem between Banach spaces: sufficiency of null sequence

Published on 14 Apr 2026 - 11:13

95

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Inequality on Hilbert spaces

Published on 09 Apr 2026 - 18:18

35

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Prove that the following inequality is satisfied

Published on 14 Apr 2026 - 15:26

59

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Finite-index normal subgroup acts amenably on compact Hausdorff space $X$

Published on 14 Apr 2026 - 8:01

36

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Is this positive operator Hermitian?

Published on 08 Apr 2026 - 19:10

49

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Showing an operator is not bounded.

Published on 11 Apr 2026 - 2:52

List Question

Compute the value of a series of integrals taking values in a Banach space

Condition for an operator to have closed Image

Find the spectrum of a linear bounded operator $T:L^1([0,1]) \longrightarrow L^1([0,1])$

Definition p-multigraded Hilbert spaces

Bounded linear operator of $\ell^{2}(\mathbb{N})$ which is normal but not self-adjoint

Compute norm of linear functional over $c_0$

Is it true that $I \otimes J$ is ideal of $A \otimes B$?

BCH formula for unbounded self-adjoint formula

Separability of group $C^*$-algebras

Closed graph theorem between Banach spaces: sufficiency of null sequence

Inequality on Hilbert spaces

Prove that the following inequality is satisfied

Finite-index normal subgroup acts amenably on compact Hausdorff space $X$

Is this positive operator Hermitian?

Showing an operator is not bounded.

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