Hi, i was wondering if i can get some advice on how to use the DA objec tin PETSC.
Is it possible to create a DA object by inserting a set of boxes into it? Or can the DA object only be used based on a single rectangular box? say my domain has 2 boxes: 1) (0,0) - (64,64) 2) (64,64) - (128,128) Can i "register" those 2 boxes with the object? If that is possible, then is it valid if certain cells/nodes of these boxes overlap? say they both contain cell/node (64,64)? If that is possible, and i run in parallel, will the solution on cell/node (64,64) be returned to both processes (the first owning box1 and the second box2). Right now i am building my matrix 'by hand' and i believe the mentioned "overlap" is causing an ill-conditioned matrix (as addressed earlier in this list), even through the values on the overlapping nodes are the same. thanks matt -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20091008/926726cf/attachment.htm>
