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- From: dak@tabaqui.informatik.rwth-aachen.de (David Kastrup)
- Subject: Re: Help - non-integral power of a matrix?
- Message-ID: <dak.713688793@tabaqui>
- Keywords: matrix
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- Organization: Rechnerbetrieb Informatik / RWTH Aachen
- References: <Aug.10.15.45.34.1992.26563@clam.rutgers.edu> <carle.713599691@vex> <israel.713611315@unixg.ubc.ca>
- Date: 13 Aug 92 06:53:13 GMT
- Lines: 7
-
- Well, suppose that you have an Eigenvalue decomposition
- A = TDT^{-1}, where T is the matrix of Eigenvectors, D is a strictly diagonal
- matrix with the Eigenvalues. Works only if your MAtrix is decomposable
- in such a way, that is, HAS N different Eigenvectors if its size is NxN.
-
- Then A^a would simply be TD^aT^{-1}, where powering a diagonal matrix is
- done by powering its diagonal elements.
-