Preconditioned CG

Nicolas Tancogne-Dejeanrequested to merge
preconditioned_linear_solver_cg into develop

Description

The CG linear solver now uses the preconditioner, for faster convergence.

News snippet

The CG linear solver now uses the preconditioner, for faster convergence.

Checklist

  • I have checked that my code follows the Octopus coding standards
  • I have added tests for all the new features added in this request.

Merge request reports