Spectral decomposition is any of several things:
* Spectral decomposition for matrix:
eigendecomposition of a matrix
* Spectral decomposition for linear operator:
spectral theorem
In mathematics, particularly linear algebra and functional analysis, a spectral theorem is a result about when a linear operator or matrix (mathematics), matrix can be Diagonalizable matrix, diagonalized (that is, represented as a diagonal matrix i ...
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Decomposition of spectrum (functional analysis)
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