Question

Boundedness of the projection operator.

score 323 · Answer 1 · 2026-04-10 02:02:11

323

Views

Boundedness of the projection operator.

Published on 10 Apr 2026 - 2:02

score 49 · Answer 2 · 2026-04-11 11:20:17

49

Views

Checking of continuity of the operators

Published on 11 Apr 2026 - 11:20

score 60 · Answer 3 · 2026-03-25 06:04:56

60

Views

Infinite application of an operator to all coordinates

Published on 25 Mar 2026 - 6:04

score 105 · Answer 4 · 2026-04-13 09:03:34

105

Views

the Moore-Penrose inverse of $1-ba$ when $1-ab$ is Moore-Penrose invertible

Published on 13 Apr 2026 - 9:03

score 6.1k · Answer 5 · 2026-04-16 20:42:37

6.1k

Views

Commutator of $[A^{n},A^{\dagger n}]$

Published on 16 Apr 2026 - 20:42

score 111 · Answer 6 · 2026-04-12 09:32:50

111

Views

Another way to show compactness of a Hilbert Schmidt operator

Published on 12 Apr 2026 - 9:32

score 41 · Answer 7 · 2026-04-16 02:34:47

41

Views

$ T‎ :‎ ‎L‎^{P} [ 0 , ‎1] ‎\longrightarrow ‎L‎^{P} [ 0 , ‎1‎]‎$‎

Published on 16 Apr 2026 - 2:34

score 54 · Answer 8 · 2026-04-16 06:49:16

54

Views

$ ‎\sigma (‎ T‎ )‎ ‎\subset ‎\{‎ ‎\lambda ‎\in ‎\mathbb{C} : ‎\mid ‎\lambda ‎\mid = 1 \}‎$

Published on 16 Apr 2026 - 6:49

score 56 · Answer 9 · 2026-04-13 01:48:03

56

Views

normal compact operators

Published on 13 Apr 2026 - 1:48

score 59 · Answer 10 · 2026-04-17 11:13:22

59

Views

Square root of $M‎_{‎\varphi‎}:‎L‎^{2}[0,1]‎\to‎L‎^2[0,1]‎$,‎ ‎$‎M‎_{‎\varphi}(f)= ‎\varphi f$‎

Published on 17 Apr 2026 - 11:13

score 699 · Answer 11 · 2026-03-26 08:14:40

699

Views

A good reference to begin Operator Semigroups

Published on 26 Mar 2026 - 8:14

score 881 · Answer 12 · 2026-04-11 14:48:56

881

Views

Showing that the ideal of compact operators is not necessarily closed in the weak operator topology

Published on 11 Apr 2026 - 14:48

score 28 · Answer 13 · 2026-04-15 05:10:06

28

Views

Possible to find the operator $A$ if I know the operators $K$ and $B$ and the spectrums are related by $\sigma(K) = \sigma(A) \bigcup \sigma(B)$?

Published on 15 Apr 2026 - 5:10

score 135 · Answer 14 · 2026-04-08 02:47:34

135

Views

How does the spectrum behave under WOT convergence?

Published on 08 Apr 2026 - 2:47

score 206 · Answer 15 · 2026-04-14 14:42:03

206

Views

Is the closure of the direct sum of eigenspaces of an operator $T$ an invariant subspace of $T$?

Published on 14 Apr 2026 - 14:42

List Question

Boundedness of the projection operator.

Checking of continuity of the operators

Infinite application of an operator to all coordinates

the Moore-Penrose inverse of $1-ba$ when $1-ab$ is Moore-Penrose invertible

Commutator of $[A^{n},A^{\dagger n}]$

Another way to show compactness of a Hilbert Schmidt operator

$ T‎ :‎ ‎L‎^{P} [ 0 , ‎1] ‎\longrightarrow ‎L‎^{P} [ 0 , ‎1‎]‎$‎

$ ‎\sigma (‎ T‎ )‎ ‎\subset ‎\{‎ ‎\lambda ‎\in ‎\mathbb{C} : ‎\mid ‎\lambda ‎\mid = 1 \}‎$

normal compact operators

Square root of $M‎_{‎\varphi‎}:‎L‎^{2}[0,1]‎\to‎L‎^2[0,1]‎$,‎ ‎$‎M‎_{‎\varphi}(f)= ‎\varphi f$‎

A good reference to begin Operator Semigroups

Showing that the ideal of compact operators is not necessarily closed in the weak operator topology

Possible to find the operator $A$ if I know the operators $K$ and $B$ and the spectrums are related by $\sigma(K) = \sigma(A) \bigcup \sigma(B)$?

How does the spectrum behave under WOT convergence?

Is the closure of the direct sum of eigenspaces of an operator $T$ an invariant subspace of $T$?

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