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Topic: How to invert a matrix?
Replies: 6   Last Post: Oct 9, 1996 11:18 AM

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 chris mahmood Posts: 5 Registered: 12/15/04
Re: How to invert a matrix?
Posted: Sep 29, 1996 2:00 AM

This is not the kind of thing you can learn on usenet. Do you want to
know what the inverse of matrix is or do you have a matrix that you'd like
to invert and you are interested in methods? These are to very different
questions.

In scalar arithmetic, the inverse of a number is that number that when
multiplied by the number equals unity. E.g., 2 * 1/2 = 1.
Same thing with matrices, the inverse of a matrix A is that matrix (call
it B) that when multiplied by A gives the matrix equivalent of unity, the
identity matrix (which is just a matrix of the same rank as A which has
ones on the major diagonal and zeros elsewhere). E.g., A*B=I.

Doing this in practice something of an art. You might want to take a
class in linear algebra and get a book on numerical methods to help you.
-ckm

Date Subject Author
9/28/96 Robert Gelb
9/29/96 chris mahmood
9/30/96 Eric Weiss
10/2/96 george_cummings@email.mot.com
10/8/96 David Nichols
10/9/96 Michael M. Kostreva
10/7/96 Michael Nachtigaeller