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Man Pages


Manual Reference Pages  -  BSTRI_MULT (3)

NAME

BStri_mult - Multiply the matrix (A - shift*B) by a block of vectors

CONTENTS

Input Parameters
Output Parameters
Returns
Notes
Synopsis
Location

INPUT PARAMETERS

A - a sparse matrix
comm_A
  - the communication structure for A
B - a sparse matrix
comm_B
  - the communication structure for B
v1 - the block of vectors to multiply by
t1 - a block of work vectors
t2 - a block of work vectors
shift - the shift value in (A-shift*B)
BS - the number of vectors in v1
procinfo
  - the usual processor stuff

OUTPUT PARAMETERS

v2 - the resulting block of vectors

RETURNS

void

NOTES

Different code is used to multiply a single vector than is used to multiply a block of vectors (this improves efficiency). Also different code is used if shift=0.0. If B is NULL, then we assume that it is the identity matrix.

SYNOPSIS

void BStri_mult(BSpar_mat *A, BScomm *comm_A, BSpar_mat *B, BScomm *comm_B,
 FLOAT *v1, FLOAT *v2, FLOAT *t1, FLOAT *t2, FLOAT shift, int BS,
 BSprocinfo *procinfo)

LOCATION

BlockSolve95/src/BStri_mult.c
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BSTRI_MULT (3) 4/4/1996

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