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LDL is a set of concise routines for factorizing symmetric
positivedefinite sparse matrices, with some applicability to symmetric
indefinite matrices. Its primary purpose is to illustrate much of the
basic theory of sparse matrix algorithms in as concise a code as possible,
including an elegant new method of sparse symmetric factorization that
computes the factorization rowbyrow but stores it columnbycolumn.
This package is part of SuiteSparse.
