tree 699460be6f2e6a038caacf50a1d8a31e65cb571a
parent 3f6d01f313a646127b754de430cd7250c9b722a7
author Sameer Agarwal <sameeragarwal@google.com> 1492026524 -0700
committer Sameer Agarwal <sameeragarwal@google.com> 1495609225 -0700

Add SparseCholesky

SparseCholesky is an interface to sparse cholesky factorization
routines across sparse linear algebra libraries. Each sparse
linear algebra library is responsible for implementing its own
instance of this interface.

As a result the various places - SparseNormalCholeskySolver,
SparseSchurComplementSolver and VisibilityBasedPreconditioner
are significantly simplified.

Change-Id: I8b465705eae83bba9e1adfffcc741a05c70faf2e