Contents

type

Types of preconditioner.

Declaration

var type: SparsePreconditioner_t

Discussion

SparsePreconditionerNone: No preconditioner, used to flag an empty type as required.
SparsePreconditionerUser: User-defined preconditioner.
SparsePreconditionerDiagonal: Diagonal (Jacobi) preconditioner D_ii = 1.0 / A_ii. Zero entries on the diagonal of A are replaced with 1.0.
SparsePreconditionerDiagScaling: Diagonal scaling preconditioner D_ii = 1.0 / || A_i ||_2, where A_i is i-th column of A.