List questions from operator-theory

Published on 09 Feb 2018 - 4:55

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Do the following $l_1$-functionals attain their norm?

Published on 26 Mar 2026 - 13:43

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Prove that operator is Zero operator.

Published on 25 Mar 2026 - 5:59

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Integral Gronwall Estimate for Operators.

Published on 25 Mar 2026 - 23:38

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Find the coefficient polynomials $Q_k(x)$ of $T$ in the representation $T = \sum_{k=0}^{\infty} Q_k(x)D^k$.

Published on 09 Feb 2018 - 20:22

75

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Composition of regularized inverse of linear operator on dense subspace converges on whole space?

Published on 19 Mar 2026 - 15:50

131

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Prove that $U_{\alpha}$ is a family of unitary operators

Published on 25 Mar 2026 - 6:04

39

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$\|T\| \neq \sup_{\|h\|=1} |\langle Th,h\rangle |$

Published on 25 Mar 2026 - 7:49

106

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Spectral Measure of Unitary Operators

Published on 25 Mar 2026 - 8:09

53

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Product between normal and hyponormal operators which commute is hyponormal

Published on 25 Mar 2026 - 9:23

31

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question related to the norm of bounded linear operator

Published on 25 Mar 2026 - 9:16

3.6k

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Spectrum of unitary operators lie in the unit circle

Published on 25 Mar 2026 - 8:10

55

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Bound and norm of operator

Published on 12 Feb 2018 - 23:58

664

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Letting $x_n\to x$ weakly in a normed vector space $X$, prove the following statement.

Published on 25 Mar 2026 - 6:05

288

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Spectrum of a linear operator

Published on 13 Feb 2018 - 0:41

List Question

The set of surjective operatrs between normed spaces

Do the following $l_1$-functionals attain their norm?

Prove that operator is Zero operator.

Integral Gronwall Estimate for Operators.

Find the coefficient polynomials $Q_k(x)$ of $T$ in the representation $T = \sum_{k=0}^{\infty} Q_k(x)D^k$.

Composition of regularized inverse of linear operator on dense subspace converges on whole space?

Prove that $U_{\alpha}$ is a family of unitary operators

$\|T\| \neq \sup_{\|h\|=1} |\langle Th,h\rangle |$

Spectral Measure of Unitary Operators

Product between normal and hyponormal operators which commute is hyponormal

question related to the norm of bounded linear operator

Spectrum of unitary operators lie in the unit circle

Bound and norm of operator

Letting $x_n\to x$ weakly in a normed vector space $X$, prove the following statement.

Spectrum of a linear operator

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