slepc-3.8.3 2018-04-03
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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 on BV and Vec

Input Parameters

X  - a basis vectors object
alpha,beta  - scalars
y  - a vector
q  - an array of scalars

Output Parameter

y  - the modified vector

Notes

This operation is the analogue of BVMult() but with a BV and a Vec, instead of two BV. 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

BVMult(), BVMultColumn(), BVMultInPlace(), BVSetActiveColumns()

Location: src/sys/classes/bv/interface/bvops.c
Index of all BV routines
Table of Contents for all manual pages
Index of all manual pages