Dear PETSc developers, Can you give me some advice on possible/recommended choices of preconditioners in the case of matrix free ksp? I create my matrix using MatCreateShell(). The matrix is not symmetric. I understand that the typical preconditioners like ILU or JACOBI will not work since they require access to the matrix entries. Is there any good precoditioner that will work?
Best Regards, Tim -- Dr. Tim Kroeger Phone +49-421-218-7710 tim.kroeger at mevis.de, tim.kroeger at cevis.uni-bremen.de Fax +49-421-218-4236 MeVis Research GmbH, Universitaetsallee 29, 28359 Bremen, Germany Amtsgericht Bremen HRB 16222 Geschaeftsfuehrer: Prof. Dr. H.-O. Peitgen
