1% SPARSEINV  The sparseinv function computes the sparse inverse subset of a
2% sparse matrix A.  These entries in the inverse subset correspond to nonzero
3% entries in the factorization of A.  They can be computed without computing
4% all of the entries in inv(A), so this method is much faster and takes much
5% less memory than inv(A).  If A is symmetric and positive definite, then all
6% entries of the diagona of inv(A) are computed (as well as many off-diagonal
7% terms.  This version is restricted to real sparse matrices.  A complex
8% version is left for future work.
9%
10% Copyright (c) 2011, Timothy A. Davis
11%
12% Files
13%   sparseinv         - computes the sparse inverse subset of a real sparse square matrix A.
14%   sparseinv_install - compiles and installs the sparseinv function.
15%   sparseinv_test    - tests the sparseinv function.
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