TESTING/LIN/zlaptm.f(3) | Library Functions Manual | TESTING/LIN/zlaptm.f(3) |
NAME
TESTING/LIN/zlaptm.f
SYNOPSIS
Functions/Subroutines
subroutine zlaptm (uplo, n, nrhs, alpha, d, e, x, ldx,
beta, b, ldb)
ZLAPTM
Function/Subroutine Documentation
subroutine zlaptm (character uplo, integer n, integer nrhs, double precision alpha, double precision, dimension( * ) d, complex*16, dimension( * ) e, complex*16, dimension( ldx, * ) x, integer ldx, double precision beta, complex*16, dimension( ldb, * ) b, integer ldb)
ZLAPTM
Purpose:
ZLAPTM multiplies an N by NRHS matrix X by a Hermitian tridiagonal matrix A and stores the result in a matrix B. The operation has the form B := alpha * A * X + beta * B where alpha may be either 1. or -1. and beta may be 0., 1., or -1.
Parameters
UPLO
UPLO is CHARACTER Specifies whether the superdiagonal or the subdiagonal of the tridiagonal matrix A is stored. = 'U': Upper, E is the superdiagonal of A. = 'L': Lower, E is the subdiagonal of A.
N
N is INTEGER The order of the matrix A. N >= 0.
NRHS
NRHS is INTEGER The number of right hand sides, i.e., the number of columns of the matrices X and B.
ALPHA
ALPHA is DOUBLE PRECISION The scalar alpha. ALPHA must be 1. or -1.; otherwise, it is assumed to be 0.
D
D is DOUBLE PRECISION array, dimension (N) The n diagonal elements of the tridiagonal matrix A.
E
E is COMPLEX*16 array, dimension (N-1) The (n-1) subdiagonal or superdiagonal elements of A.
X
X is COMPLEX*16 array, dimension (LDX,NRHS) The N by NRHS matrix X.
LDX
LDX is INTEGER The leading dimension of the array X. LDX >= max(N,1).
BETA
BETA is DOUBLE PRECISION The scalar beta. BETA must be 0., 1., or -1.; otherwise, it is assumed to be 1.
B
B is COMPLEX*16 array, dimension (LDB,NRHS) On entry, the N by NRHS matrix B. On exit, B is overwritten by the matrix expression B := alpha * A * X + beta * B.
LDB
LDB is INTEGER The leading dimension of the array B. LDB >= max(N,1).
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Definition at line 127 of file zlaptm.f.
Author
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.12.0 | LAPACK |