.TH CGERU 1 "November 2006" "BLAS routine" "BLAS routine" .SH NAME CGERU - the rank 1 operation A := alpha*x*y\(aq + A, .SH SYNOPSIS .TP 48 SUBROUTINE CGERU(M,N,ALPHA,X,INCX,Y,INCY,A,LDA) .TP 48 .ti +4 COMPLEX ALPHA .TP 48 .ti +4 INTEGER INCX,INCY,LDA,M,N .TP 48 .ti +4 COMPLEX A(LDA,*),X(*),Y(*) .SH PURPOSE CGERU performs the rank 1 operation where alpha is a scalar, x is an m element vector, y is an n element vector and A is an m by n matrix. .br .SH ARGUMENTS .TP 7 M - INTEGER. On entry, M specifies the number of rows of the matrix A. M must be at least zero. Unchanged on exit. .TP 7 N - INTEGER. On entry, N specifies the number of columns of the matrix A. N must be at least zero. Unchanged on exit. .TP 7 ALPHA - COMPLEX . On entry, ALPHA specifies the scalar alpha. Unchanged on exit. .TP 7 X - COMPLEX array of dimension at least ( 1 + ( m - 1 )*abs( INCX ) ). Before entry, the incremented array X must contain the m element vector x. Unchanged on exit. .TP 7 INCX - INTEGER. On entry, INCX specifies the increment for the elements of X. INCX must not be zero. Unchanged on exit. .TP 7 Y - COMPLEX array of dimension at least ( 1 + ( n - 1 )*abs( INCY ) ). Before entry, the incremented array Y must contain the n element vector y. Unchanged on exit. .TP 7 INCY - INTEGER. On entry, INCY specifies the increment for the elements of Y. INCY must not be zero. Unchanged on exit. .TP 7 A - COMPLEX array of DIMENSION ( LDA, n ). Before entry, the leading m by n part of the array A must contain the matrix of coefficients. On exit, A is overwritten by the updated matrix. .TP 7 LDA - INTEGER. On entry, LDA specifies the first dimension of A as declared in the calling (sub) program. LDA must be at least max( 1, m ). Unchanged on exit. Level 2 Blas routine. -- Written on 22-October-1986. Jack Dongarra, Argonne National Lab. Jeremy Du Croz, Nag Central Office. Sven Hammarling, Nag Central Office. Richard Hanson, Sandia National Labs.