This directory contains the MLD2P4 set of preconditioners. developed by Salvatore Filippone Pasqua D'Ambra Daniela di Serafino To compile: 1. Edit Makefile and point PSBLASDIR to the main directory containing the PSBLAS source code 2. Edit the Makefile in the main PSBLAS dir modifying the PREC variable to make it point to this directory, e.g. PREC=../mld2p4 3. Run make from the main PSBLAS directory.