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15
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Why isn't every element of the spectrum an eigenvalue? (Where is the error in my proof?)

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#functional-analysis #eigenvalues-eigenvectors #hilbert-spaces #spectral-theory
73
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Are they true these generalizations from matrices to operators about functional calculus?

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#operator-theory #hilbert-spaces #spectral-theory #functional-calculus
656
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Confusion between spectral radius of matrix and spectral radius of the operator

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#linear-algebra #spectral-theory #spectral-graph-theory #infinite-matrices #infinite-graphs
680
Views

Spectrum of weighted shift operator

Published on
#functional-analysis #operator-theory #spectral-theory
40
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Dense Operators: Spectrum

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#functional-analysis #operator-theory #banach-spaces #spectral-theory
331
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In an inner product space, if the matrix is symmetric, is an eigenspace necessarily orthogonal to the range space?

Published on
#linear-algebra #eigenvalues-eigenvectors #spectral-theory #orthogonality
50
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How does the product of sets of complex numbers give a character?

Published on
#notation #spectral-theory #c-star-algebras #banach-algebras
78
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Trace evaluation via complex analysis

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#linear-algebra #matrices #functional-analysis #spectral-theory #trace
444
Views

Construction of a Strongly Regular Graph which has regular Neighbourhood graphs in all iteration.

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#reference-request #graph-theory #spectral-theory #algebraic-graph-theory #spectral-graph-theory
171
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Operators whose spectrum has a finite number of connected component

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#functional-analysis #operator-theory #operator-algebras #spectral-theory
91
Views

A property of normal matrices

Published on
#spectral-theory #nilpotence
958
Views

Spectral resolution of multiplication operator

Published on
#analysis #functional-analysis #hilbert-spaces #spectral-theory
249
Views

Absolutely Continuous Spectrum and Norm of Resolvent

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#functional-analysis #operator-theory #hilbert-spaces #spectral-theory
107
Views

Matrix spectral space vs entry space in symmetric matrices

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#linear-algebra #matrices #spectral-theory
341
Views

Real eigenvalues, similar symmetric matrix

Published on
#matrices #eigenvalues-eigenvectors #spectral-theory

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