[firedrake] matfree

Dear Firedrakers [mostly Lawrence but asking here means it is archived and might be useful to someone], I'm using a matfree solver, for the same equation with changing coefficients, but always the same preconditioner. Is there are way to avoid rebuilding the preconditioner but updating the matrix entries? I'm hoping that this actually happens by default, because of the matfree setup, but am not sure. cheers --cjc -- http://www.imperial.ac.uk/people/colin.cotter www.cambridge.org/9781107663916