"PaStiX (Parallel Sparse matriX package) is a scientific library that
provides a high performance parallel solver for very large sparse linear
systems based on direct methods. Numerical algorithms are implemented
in single or double precision (real or complex) using LLt, LDLt and LU
with static pivoting (for non symmetric matrices having a symmetric
pattern). This solver provides also an adaptive blockwise iLU(k)
factorization that can be used as a parallel preconditioner using
approximated supernodes to build a coarser block structure of the
incomplete factors."
http://pastix.gforge.inria.fr/files/README-txt.html
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