tree 1671214fe8fe2bf189e9fc4f8c2b7c265ffb73b9
parent adda97acd7a2707ba633e54491faaaeffb86e273
author Sameer Agarwal <sameeragarwal@google.com> 1660197549 -0700
committer Sameer Agarwal <sameeragarwal@google.com> 1660682836 -0700

Refactor BlockJacobiPreconditioner

1. Rename BlockJacobiPreconditionet to BlockSparseJacobiPreconditioner.
2. Add CompressedRowSparseJacobiPreconditioner which is a
   block Jacobi preconditioner for CompressedRowSparseMatrix objects.
3. Re-write the tests to be more comprehensive.

Change-Id: Icbc91f9ad2cefaad593c11397f8cdcf805d7e118