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Re: How to invert a matrix?
Posted:
Sep 29, 1996 2:00 AM
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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
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