You can use SNESSetConvergenceTest() to use whatever test you want to decide on convergence.
Barry > On Jan 11, 2016, at 3:26 PM, Gideon Simpson <[email protected]> wrote: > > I’m solving nonlinear problem for a complex valued function which is > decomposed into real and imaginary parts, Q = u + i v. What I’m finding is > that where |Q| is small, the numerical phase errors tend to be larger. I > suspect this is because it’s using the 2-norm for convergence in the SNES, > so, where the solution is already, the phase errors are seen as small too. > Is there a way to use something more like an infinity norm with SNES, to get > more point wise control? > > -gideon >
