BVMultVec#
Computes \(y = \beta y + \alpha X q\).
Synopsis#
#include "slepcbv.h"
PetscErrorCode BVMultVec(BV X,PetscScalar alpha,PetscScalar beta,Vec y,PetscScalar q[])
Logically Collective
Input Parameters#
X - a basis vectors object
alpha - first scalar
beta - second scalar
y - a vector (modified on output)
q - an array of scalars
Notes#
This operation is the analogue of BVMult() but with a BV and a Vec,
instead of two BVs. Note that arguments are listed in different order
with respect to BVMult().
If X has leading columns specified, then these columns do not participate
in the computation.
The length of array q must be equal to the number of active columns of X
minus the number of leading columns, i.e., the first entry of q multiplies
the first non-leading column.
See Also#
BV: Basis Vectors, BVMult(), BVMultColumn(), BVMultInPlace(), BVSetActiveColumns()
Level#
intermediate
Location#
Implementations#
BVMultVec_Contiguous() in src/sys/classes/bv/impls/contiguous/contig.c
BVMultVec_Mat() in src/sys/classes/bv/impls/mat/bvmat.c
BVMultVec_Svec() in src/sys/classes/bv/impls/svec/svec.c
BVMultVec_Vecs() in src/sys/classes/bv/impls/vecs/vecs.c
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