nonsymmetric dynamics

smoother: ifpack level-of-fill ⋆ [double] Specifies fill-level for Ifpack incomplete
factorization methods. ML will internally
interpret this as an integer where appropriate.
Default: 0.0.
smoother: ifpack overlap ⋆ [int] Specifies subdomain overlap if Ifpack
smoothers are used. Default: 1.
smoother: ifpack relative
threshold ⋆
smoother: ifpack absolute
threshold ⋆
[double] Specifies relative threshold for perturbing
matrix diagonal. See [18] for details.
Default: 1.0.
[double] Specifies absolute threshold for perturbing
matrix diagonal. See [18] for details.
Default: 0.0.
smoother: Chebyshev alpha ⋆ [double] Chebyshev smoother will damps errors
between ρ and ρ/alpha where ρ is the spectral
radius of diag(A) −1 A. Default: 20.
smoother: user-defined function [int (*)(ML Smoother *, int inLength,
double *invec, int outLength, double
*outvec)] Pointer to user-defined smoothing
function. Default: NULL.
smoother: user-defined name [string] Label for user-defined smoother. Default:
“User-defined”.
smoother:
symmetric
Hiptmair efficient
[bool] Reduce the preconditioner computational
work while maintaining symmetry by doing
edge-then-node relaxation on the first leg of
the V-cycle, and node-then-edge relaxation on
the second leg. Default: true.
smoother: petsc ksp ⋆ [void*] A fully-constructed PETScKSP
smoother. Can only be used on finest level with
a matrix of type Epetra PETScAIJMatrix,
part of the EpetraExt package.
subsmoother: type ⋆ [string] Smoother to be used as a subsmoother
on the nodal and edge subproblems within
Hiptmair smoothing. It can assume one of
the following values: Chebyshev, symmetric
Gauss-Seidel, ILU, IC, ILUT, ICT. Default:
Chebyshev.
28