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adjoint of unbounded differential operator

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#functional-analysis #spectral-theory #unbounded-operators
164
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Essential spectrum of operators whose resolvent difference is compact

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#functional-analysis #operator-theory #spectral-theory #compact-operators
242
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Eigenvalues of integral operator

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#functional-analysis #eigenvalues-eigenvectors #lp-spaces #spectral-theory
335
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condition for postive symmetric operator to be essentially self-adjoint

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#functional-analysis #spectral-theory #unbounded-operators
99
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Isometric domains are isospectral for the Laplacian

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#functional-analysis #spectral-theory #laplacian #semigroup-of-operators #linear-pde
198
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spectrum of compact forward weighted shift

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#functional-analysis #operator-theory #operator-algebras #spectral-theory #banach-algebras
95
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normality of unilateral forward shift

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#functional-analysis #operator-theory #operator-algebras #spectral-theory #banach-algebras
269
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Find the spectrum and eigenvalues of an operator

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#functional-analysis #operator-theory #operator-algebras #spectral-theory #banach-algebras
97
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Show spectrum of a bilateral shift is contained in a donut

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#functional-analysis #operator-theory #spectral-theory
52
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condition for compactness of an operator

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#real-analysis #functional-analysis #operator-theory #spectral-theory
62
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reference request: hormander paper

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#reference-request #spectral-theory #means #eigenfunctions #elliptic-equations
122
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Theorem on Spectrum, point spectrum and the Calkin algebra

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#functional-analysis #operator-theory #operator-algebras #spectral-theory #banach-algebras
95
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how to prove the smallest singular value of a matrix is no smaller than the minimal eigenvalue of its symmetric part?

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#linear-algebra #numerical-linear-algebra #spectral-theory
78
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Angular excitations and Schrodinger operators with radial potential

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#soft-question #mathematical-physics #spectral-theory #sturm-liouville
25
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How to compute fourier transform of the function knowing its spectral density function?

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#fourier-analysis #physics #fourier-transform #spectral-theory #parsevals-identity

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