[petsc-users] KSPBuildResidual and KSPType compatibility

[Jed Brown]

"Fischer, Greg A. via petsc-users" <petsc-users at mcs.anl.gov> writes:

> I've attached typical examples of "A" and "b". Do these qualify as large values?

Yeah, the matrix values are of order 1e12. Usually modelers choose units so that these are closer to order 1. (One can do this by formal non-dimensionalization, but just choosing representative mass, length, and time units is often more convenient.)