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. 16