slepc3.21.1 20240426
BVTensorBuildFirstColumn
Builds the first column of the tensor basis vectors V from the data contained in the first k columns of U.
Synopsis
#include "slepcbv.h"
PetscErrorCode BVTensorBuildFirstColumn(BV V,PetscInt k)
Collective
Input Parameters
 V   the basis vectors context

 k   the number of columns of U with relevant information

Notes
At most d columns are considered, where d is the degree of the tensor BV.
Given V = (I otimes U) S, this function computes the first column of V, that
is, it computes the coefficients of the first column of S by orthogonalizing
the first d columns of U. If k is less than d (or linearly dependent columns
are found) then additional random columns are used.
The computed column has unit norm.
See Also
BVCreateTensor()
Level
advanced
Location
src/sys/classes/bv/impls/tensor/bvtensor.c
Index of all BV routines
Table of Contents for all manual pages
Index of all manual pages