[Dune] On-the-fly CG operator in ISTL

[Sacconi, Andrea]

Hi DUNErs,

I have a very quick question: I have a symmetric operator which does not have its matrix counterpart, since it is not assembled.
I need to invert it with an on-the-fly CG solver; what should I use from ISTL classes? Naturally, rhs and solution vectors have been declared as BlockVector 's.

Thanks in advance!
Andrea
__________________________________________________________

Andrea Sacconi
PhD student, Applied Mathematics
AMMP Section, Department of Mathematics, Imperial College London,
London SW7 2AZ, UK
a.sacconi11 at imperial.ac.uk