BVOrthogonalizeSomeColumn#

Orthogonalize one of the column vectors with respect to some of the previous ones.

Synopsis#

#include "slepcbv.h"   
PetscErrorCode BVOrthogonalizeSomeColumn(BV bv,PetscInt j,PetscBool *which,PetscScalar *H,PetscReal *norm,PetscBool *lindep)

Collective

Input Parameters#

  • bv - the basis vectors context

  • j - index of column to be orthogonalized

  • which - logical array indicating selected columns

Output Parameters#

  • H - (optional) coefficients computed during orthogonalization

  • norm - (optional) norm of the vector after being orthogonalized

  • lindep - (optional) flag indicating that refinement did not improve the quality of orthogonalization

Notes#

This function is similar to BVOrthogonalizeColumn(), but V[j] is orthogonalized only against columns V[i] having which[i]=PETSC_TRUE. The length of array which must be j at least.

The use of this operation is restricted to MGS orthogonalization type.

In the case of an indefinite inner product, the lindep parameter is not computed (set to false).

See Also#

BVOrthogonalizeColumn(), BVSetOrthogonalization()

Level#

advanced

Location#

src/sys/classes/bv/interface/bvorthog.c

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