Hi All, I am building a shell preconditioner, for implement that I should divide a sparse matrix into four blocks of dimension N/2xN/2 (N size of the Matrix), I took a look to src/mat/examples/tutorials/ex2 but it is for dense matrix. There is a function for do that in Petsc? or another method for efficiently implementation?
Thank you, Michel Cancelliere -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20080905/7429407f/attachment.htm>
