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- From: uchpcjv@Msu.oscs.montana.edu
- Newsgroups: sci.math
- Subject: Re: eigen vectors
- Message-ID: <0095EFDB.DC362520@Msu.oscs.montana.edu>
- Date: 12 Aug 92 22:25:10 GMT
- References: <36562@sdcc12.ucsd.edu>
- Sender: usenet@coe.montana.edu (USENET News System)
- Reply-To: uchpcjv@Msu.oscs.montana.edu
- Organization: Montana State University
- Lines: 20
-
- In article <36562@sdcc12.ucsd.edu>, pak@cs.ucsd.edu (Suehee Pak) writes:
- >Any information concerning to the following question
- >would be greatly appreciated.
- >
- >Suppose A1 and A2 are square matrices. Under what conditions, if any, are the
- >eigen vectors of the two matrices same?
- >
- >Strang gives one answer: IF the matrices are diagonalizable, they have the
- >same eigenvectors if and only if A1*A2 = A2*A1.
- >
- >What happens if they are not diagonalizable?
- > ^^^
- >
- >
- Isn't it true that for any matrices we'd be interested in (physcially) would
- be "diagonalizable?" Then not only would it be true for A1*A2 = A2*A1, but
- for A1 = (constant)*A2 as well. And to be religeous, wouldn't it REALLY be
- A1(transpose)*A2 = A2(transpose)*A1?
-
- Thanks for listening.
-