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matrix inversion

From: Gorazd Brumen
Subject: matrix inversion
Date: Wed, 22 Nov 2006 12:13:31 +0100
User-agent: Thunderbird (X11/20061116)


I have a square matrix that is composed of N^2 block matrices, where
every block matrix is relatively large t x t diagonal matrix (both
N and t large), i.e.

A = [ A_{11}, A_{12} , ... A_{1N}; A_{21} ... A_{2N} ...],
where every A_{ij} is a diagonal matrix of size txt.

My question is the following: How many operations would
spinv need to do this inversion?

Thanks and regards,

Gorazd Brumen
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