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Man Pages
BStri_mult(3) BlockSolve95 BStri_mult(3)

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

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

v2
- the resulting block of vectors

void

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.

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)

BlockSolve95/src/BStri_mult.c
4/4/1996

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