List questions from operator-theory

Published on 26 Mar 2026 - 4:31

47

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$C^*$ algebras and bounded operators on $H$

Published on 26 Mar 2026 - 4:31

465

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Numerical range of $2 \times 2$ - matrix

Published on 24 Oct 2018 - 16:12

1.2k

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The tensor product of two positive operators is a positive operator

Published on 24 Oct 2018 - 19:04

184

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Surjectivity of the sum of two bounded operators

Published on 24 Oct 2018 - 21:52

42

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infinite dimensional quotient of a $C^*$ algebra

Published on 30 Mar 2026 - 19:50

75

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No embedded point spectra for (discrete) Schrodinger operators with compactly supported potential

Published on 26 Mar 2026 - 4:31

123

Views

tracial state on a non-unital simple $C^*$ algebra

Published on 26 Mar 2026 - 4:31

75

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Convergence in operator norm of $C[0, 1]$

Published on 26 Oct 2018 - 10:54

183

Views

Is $F(H)$ dense in $B(H)$?

Published on 26 Mar 2026 - 4:30

3.3k

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Definition of Adjoint Operator for Quantum Mechanics

Published on 26 Mar 2026 - 6:05

187

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compute the spectrum of the sum of shift operator $S$ and its dual $S^*$ is [-2,2]

Published on 26 Mar 2026 - 4:36

296

Views

Equicontinuity of the Image of a set of Functions under an Integral Operator.

Published on 27 Mar 2026 - 14:55

1.7k

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Proof explanation: convexity of the numerical range of an operator (Toeplitz-Hausdorff Theorem)

Published on 28 Oct 2018 - 12:52

134

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Finding the spectral radius of operator $ T(x)= (0, x_1, 2x_2, x_3, 2x_4,...)$ on $l^{1}$

Published on 25 Mar 2026 - 22:05

List Question

non-existence of nonzero special linear map on $B(H)$

$C^*$ algebras and bounded operators on $H$

Numerical range of $2 \times 2$ - matrix

The tensor product of two positive operators is a positive operator

Surjectivity of the sum of two bounded operators

infinite dimensional quotient of a $C^*$ algebra

No embedded point spectra for (discrete) Schrodinger operators with compactly supported potential

tracial state on a non-unital simple $C^*$ algebra

Convergence in operator norm of $C[0, 1]$

Is $F(H)$ dense in $B(H)$?

Definition of Adjoint Operator for Quantum Mechanics

compute the spectrum of the sum of shift operator $S$ and its dual $S^*$ is [-2,2]

Equicontinuity of the Image of a set of Functions under an Integral Operator.

Proof explanation: convexity of the numerical range of an operator (Toeplitz-Hausdorff Theorem)

Finding the spectral radius of operator $ T(x)= (0, x_1, 2x_2, x_3, 2x_4,...)$ on $l^{1}$

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