[petsc-users] user defined algorithm for newton solver

[Michael Povolotskyi]

Dear Petsc developers and users,
I'm solving a nonlinear system with PETSc.
Often simple Newton iterations do not work and I have to use either 
linear search or trust region.
I would like to use my own algorithm to find a next iteration 
approximation to solution if the Newton step does not improve the 
residual. As far as I can see I have to define my own SNELLineSearch 
object. Is there any example that shows how to do it?
Thank you,
Michael.

-- 
Michael Povolotskyi, PhD
Research Assistant Professor
Network for Computational Nanotechnology
Hall for Discover and Learning Research, Room 441
West Lafayette, IN 47907
Phone (765) 4949396