MathGroup Archive 1989

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Matrix Algebra Package

Has anyone developed a matrix algrebra package for Mathematica? I need one
that knows about matrix dimensions, manipulation rules, (esp. invertibility
rules), and other goodies such as trace and determinant rules. I know this
is fairly straightforward, but someone must have written one somewhere.

	Don Johnson
	Electrical & Computer Engineering
	Rice University
	(dhj at

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