petsc-3.7.5 2017-01-01

PCSPAI

Use the Sparse Approximate Inverse method of Grote and Barnard as a preconditioner (SIAM J. Sci. Comput.; vol 18, nr 3)

	-pc_spai_epsilon <eps>	- set tolerance
	-pc_spai_nbstep <n>	- set nbsteps
	-pc_spai_max <m>	- set max
	-pc_spai_max_new <m>	- set maxnew
	-pc_spai_block_size <n>	- set block size
	-pc_spai_cache_size <n>	- set cache size
	-pc_spai_sp <m>	- set sp
	-pc_spai_set_verbose <true,false>	- verbose output

Notes: This only works with AIJ matrices.