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Peter

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14 votes

Norm of self-adjoint operator

functional-analysis operator-theory asked Jul 7, 2014 at 18:42
math.stackexchange.com

14 votes

Position operator in QFT

homework quantum-field-theory operators hilbert-space fourier-transform asked Oct 21, 2014 at 15:06
physics.stackexchange.com

13 votes

$\frac{d}{dt} (A+t B)^p\,\text{ for } p\geq 1$

fa.functional-analysis asked Oct 21, 2015 at 18:46
mathoverflow.net

10 votes

$e_n \to 0$ weakly in $l^\infty$

functional-analysis lp-spaces weak-convergence asked Nov 17, 2014 at 11:32
math.stackexchange.com

7 votes

Compactness Sobolev embedding for radial functions on $\mathbb{R}^N$

pde sobolev-spaces lp-spaces asked Feb 20, 2015 at 16:34
math.stackexchange.com

7 votes

Every self-adjoint trace class operator on $L^2$ has integral kernel

fa.functional-analysis hilbert-spaces traces integral-kernel asked Feb 25, 2016 at 14:13
mathoverflow.net

6 votes

Selfadjointness of Coulomb Hamiltonian in $d\geq3$ dimensions

functional-analysis operator-theory sobolev-spaces mathematical-physics differential-operators asked Jan 24, 2014 at 10:10
math.stackexchange.com

6 votes

Every self-adjoint trace class operator on $L^2$ has integral kernel

functional-analysis eigenvalues-eigenvectors asked Feb 23, 2016 at 13:35
math.stackexchange.com

6 votes

$p^2=p\in \bar{I}$, I ideal of Banach algebra $\Rightarrow p\in I$

functional-analysis banach-spaces ideals banach-algebras asked Dec 23, 2014 at 9:50
math.stackexchange.com

6 votes

Subspaces of same finite codimension are isomorphic

linear-algebra functional-analysis normed-spaces asked Nov 6, 2014 at 14:50
math.stackexchange.com

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