slepc-3.15.0 2021-03-31

DSPseudoOrthogonalize

Orthogonalize the columns of a matrix with Modified Gram-Schmidt in an indefinite inner product space defined by a signature.

#include "slepcds.h" 
PetscErrorCode DSPseudoOrthogonalize(DS ds,DSMatType mat,PetscInt cols,PetscReal *s,PetscInt *lindcols,PetscReal *ns)

Logically Collective on ds

	ds	- the direct solver context
	mat	- the matrix
	cols	- number of columns to orthogonalize (starting from column zero)
	s	- the signature that defines the inner product

	lindcols	- (optional) linearly independent columns of the matrix
	ns	- (optional) the new signature of the vectors

After the call the matrix satisfies A'*s*A = ns.