Barry,
The hybrid Chebyshev was implemented for experimentation, but had not
been found useful, so the default is set as FALSE.
I can add a functional interface though.
Hong
On Tue, Mar 11, 2014 at 9:15 PM, Smith, Barry F. <bsm...@mcs.anl.gov> wrote:
>
> There should be a functional interface for turning this on and off with a
> manual page.
>
> Barry
>
> /*
> Use hybrid Chebyshev.
> Ref: "A hybrid Chebyshev Krylov-subspace algorithm for solving
> nonsymmetric systems of linear equations",
> Howard Elman and Y. Saad and P. E. Saylor, SIAM Journal on
> Scientific and Statistical Computing, 1986.
> */
> ierr = PetscOptionsBool("-ksp_chebyshev_hybrid","Use hybrid
> Chebyshev","",cheb->hybrid,&cheb->hybrid,NULL);CHKERRQ(ierr);
> ierr = PetscOptionsInt("-ksp_chebyshev_hybrid_chebysteps","Number of
> Chebyshev steps in hybrid
> Chebyshev","",cheb->chebysteps,&cheb->chebysteps,NULL);CHKERRQ(ierr);
> ierr = PetscOptionsInt("-ksp_chebyshev_hybrid_eststeps","Number of
> adaptive/est steps in hybrid
> Chebyshev","",cheb->eststeps,&cheb->eststeps,NULL);CHKERRQ(ierr);
> ierr = PetscOptionsBool("-ksp_chebyshev_hybrid_purification","Use
> purification in hybrid
> Chebyshev","",cheb->purification,&cheb->purification,NULL);CHKERRQ(ierr);
>
>
>
