slepc-main 2024-12-17
BVTensorGetFactors
Returns the two factors involved in the definition of the tensor basis vectors object, V = (I otimes U) S.
Synopsis
#include "slepcbv.h"
PetscErrorCode BVTensorGetFactors(BV V,BV *U,Mat *S)
Logically Collective
Input Parameter
| V | - the basis vectors context
|
Output Parameters
| U | - the BV factor
|
| S | - the Mat factor
|
Notes
The returned factors are references (not copies) of the internal factors,
so modifying them will change the tensor BV as well. Some operations of the
tensor BV assume that U has orthonormal columns, so if the user modifies U
this restriction must be taken into account.
The returned factors must not be destroyed. BVTensorRestoreFactors() must
be called when they are no longer needed.
Pass a NULL vector for any of the arguments that is not needed.
See Also
BVTensorRestoreFactors()
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