Question

Semigroups: given $\|S_T f\| \leq C$, what can I say about $\|S_t f\|$ for $t \leq T$?

score 65 · Answer 1 · 2026-03-25 23:40:29

65

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Semigroups: given $\|S_T f\| \leq C$, what can I say about $\|S_t f\|$ for $t \leq T$?

Published on 25 Mar 2026 - 23:40

score 33 · Answer 2 · 2026-04-08 16:05:39

33

Views

Is the function mapping a self-adjoint operator on a Hilbert space to the maximum of its spectrum differentiable?

Published on 08 Apr 2026 - 16:05

score 438 · Answer 3 · 2026-04-09 02:20:43

438

Views

Spectrum of complex normed space bounded operator

Published on 09 Apr 2026 - 2:20

score 262 · Answer 4 · 2026-03-28 13:41:39

262

Views

Use of the symbolic operator $\left[e^{\frac{\partial}{\partial x}}\right]$ in Taylor's expansion

Published on 28 Mar 2026 - 13:41

score 416 · Answer 5 · 2026-04-04 23:26:02

416

Views

Orthonormal basis for Hilbert Schmidt operators

Published on 04 Apr 2026 - 23:26

score 140 · Answer 6 · 2026-03-30 03:19:55

140

Views

homomorphisms of B(H)

Published on 30 Mar 2026 - 3:19

score 35 · Answer 7 · 2026-04-08 16:30:21

35

Views

Representation formula for the $n$th power of a self-adjoint operator in terms of the spectral measure

Published on 08 Apr 2026 - 16:30

score 146 · Answer 8 · 2026-04-04 23:26:29

146

Views

Is the image by a closed range operator of a closed subspace closed too?

Published on 04 Apr 2026 - 23:26

score 127 · Answer 9 · 2026-03-31 20:59:20

127

Views

Boundedness of the Hilbert-Hankel operator on $L^p(\mathbb{R^+})$

Published on 31 Mar 2026 - 20:59

score 61 · Answer 10 · 2019-10-11 21:40:24

61

Views

BCH formula for finding $\hat{C}$ in equation $e^{\hat{A}}e^{\hat{B}}=e^{\hat{A}+\hat{B}}e^{\hat{C}}$

Published on 11 Oct 2019 - 21:40

score 62 · Answer 11 · 2026-03-26 20:38:29

62

Views

positive invertible elements in some $C^*$ algebra

Published on 26 Mar 2026 - 20:38

score 120 · Answer 12 · 2026-02-23 06:36:27

120

Views

Continuous functional calculus of two commutative opertors

Published on 23 Feb 2026 - 6:36

score 44 · Answer 13 · 2026-03-28 22:26:52

44

Views

Minimize $\langle(1-\kappa)^{-1}f,f\rangle$ for a parameter-dependent integral operator $\kappa$

Published on 28 Mar 2026 - 22:26

score 263 · Answer 14 · 2026-03-27 08:29:49

263

Views

Polar decomposition for general $C^*$-algebra

Published on 27 Mar 2026 - 8:29

score 87 · Answer 15 · 2026-04-09 03:56:10

87

Views

continuous functional calculus about exponential function and log function

Published on 09 Apr 2026 - 3:56

List Question

Semigroups: given $\|S_T f\| \leq C$, what can I say about $\|S_t f\|$ for $t \leq T$?

Is the function mapping a self-adjoint operator on a Hilbert space to the maximum of its spectrum differentiable?

Spectrum of complex normed space bounded operator

Use of the symbolic operator $\left[e^{\frac{\partial}{\partial x}}\right]$ in Taylor's expansion

Orthonormal basis for Hilbert Schmidt operators

homomorphisms of B(H)

Representation formula for the $n$th power of a self-adjoint operator in terms of the spectral measure

Is the image by a closed range operator of a closed subspace closed too?

Boundedness of the Hilbert-Hankel operator on $L^p(\mathbb{R^+})$

BCH formula for finding $\hat{C}$ in equation $e^{\hat{A}}e^{\hat{B}}=e^{\hat{A}+\hat{B}}e^{\hat{C}}$

positive invertible elements in some $C^*$ algebra

Continuous functional calculus of two commutative opertors

Minimize $\langle(1-\kappa)^{-1}f,f\rangle$ for a parameter-dependent integral operator $\kappa$

Polar decomposition for general $C^*$-algebra

continuous functional calculus about exponential function and log function

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