Question

Understanding the spectral measure of unbounded self-adjoint operator

score 82 · Answer 1 · 2021-02-11 12:51:20

82

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Understanding the spectral measure of unbounded self-adjoint operator

Published on 11 Feb 2021 - 12:51

score 69 · Answer 2 · 2021-02-11 15:18:14

69

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Functional Calculus F(T)

Published on 11 Feb 2021 - 15:18

score 100 · Answer 3 · 2021-02-19 16:20:44

100

Views

functional calculus on C*-algebra and majoration of $||f(A+B)-f(A)||$

Published on 19 Feb 2021 - 16:20

score 42 · Answer 4 · 2021-02-21 15:44:34

42

Views

Trying to derive the path integral from first principles (step 1)

Published on 21 Feb 2021 - 15:44

score 104 · Answer 5 · 2021-02-25 06:56:37

104

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Notational confusion in derivation of Euler-Lagrange equations

Published on 25 Feb 2021 - 6:56

score 56 · Answer 6 · 2021-03-02 12:59:15

56

Views

Correspondence between divergent integrals and analythic functionals

Published on 02 Mar 2021 - 12:59

score 60 · Answer 7 · 2021-03-11 05:16:20

60

Views

Polar Form of a Matrix (functional calculus )

Published on 11 Mar 2021 - 5:16

score 208 · Answer 8 · 2021-03-14 12:18:35

208

Views

Finding the minimizer of the variational problem $J[y]= \int_{0}^{2} \left( 1-y'^2 \right)^2dx $ with $y(0)=0$ and $y(2)=0$.

Published on 14 Mar 2021 - 12:18

score 40 · Answer 9 · 2021-05-27 20:25:08

40

Views

Gelfand "Calculus of Variation" 1.7 question on definition and purpose of variational derivative

Published on 27 May 2021 - 20:25

score 111 · Answer 10 · 2021-06-11 19:28:56

111

Views

Spectrum of isometry not in circle

Published on 11 Jun 2021 - 19:28

score 116 · Answer 11 · 2021-06-16 07:36:09

116

Views

Why is functional calculus called functional calculus? What does functional mean in functional calculus?

Published on 16 Jun 2021 - 7:36

score 57 · Answer 12 · 2021-06-21 13:22:40

57

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Finding the minimizer of $I[f]=\int_1^2 (x^2 f'(x)^2+2f(x)^2)dx$

Published on 21 Jun 2021 - 13:22

score 116 · Answer 13 · 2021-06-22 11:21:55

116

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$U$ unitary: $\mathbb{T}\ne\sigma(U)$. Prove $\forall\varepsilon>0$ there exists a polynomial $p(z)$ such that $\|U^{-1}-p(U)\|<\varepsilon.$

Published on 22 Jun 2021 - 11:21

score 338 · Answer 14 · 2021-06-25 03:10:25

338

Views

Norm of the difference of two positive elements in a $C^\star$ algebra

Published on 25 Jun 2021 - 3:10

score 220 · Answer 15 · 2021-07-15 13:48:54

220

Views

Continuous functional calculus (Composition)

Published on 15 Jul 2021 - 13:48

List Question

Understanding the spectral measure of unbounded self-adjoint operator

Functional Calculus F(T)

functional calculus on C*-algebra and majoration of $||f(A+B)-f(A)||$

Trying to derive the path integral from first principles (step 1)

Notational confusion in derivation of Euler-Lagrange equations

Correspondence between divergent integrals and analythic functionals

Polar Form of a Matrix (functional calculus )

Finding the minimizer of the variational problem $J[y]= \int_{0}^{2} \left( 1-y'^2 \right)^2dx $ with $y(0)=0$ and $y(2)=0$.

Gelfand "Calculus of Variation" 1.7 question on definition and purpose of variational derivative

Spectrum of isometry not in circle

Why is functional calculus called functional calculus? What does functional mean in functional calculus?

Finding the minimizer of $I[f]=\int_1^2 (x^2 f'(x)^2+2f(x)^2)dx$

$U$ unitary: $\mathbb{T}\ne\sigma(U)$. Prove $\forall\varepsilon>0$ there exists a polynomial $p(z)$ such that $\|U^{-1}-p(U)\|<\varepsilon.$

Norm of the difference of two positive elements in a $C^\star$ algebra

Continuous functional calculus (Composition)

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