SRC/slarf1l.f(3) Library Functions Manual SRC/slarf1l.f(3) NAME SRC/slarf1l.f SYNOPSIS Functions/Subroutines subroutine slarf1l (side, m, n, v, incv, tau, c, ldc, work) SLARF1L applies an elementary reflector to a general rectangular Function/Subroutine Documentation subroutine slarf1l (character side, integer m, integer n, real, dimension( * ) v, integer incv, real tau, real, dimension( ldc, * ) c, integer ldc, real, dimension( * ) work) SLARF1L applies an elementary reflector to a general rectangular Purpose: !> !> SLARF1L applies a real elementary reflector H to a real m by n matrix !> C, from either the left or the right. H is represented in the form !> !> H = I - tau * v * v**T !> !> where tau is a real scalar and v is a real vector assuming v(lastv) = 1, !> where lastv is the last non-zero element. !> !> If tau = 0, then H is taken to be the unit matrix. !> Parameters SIDE !> SIDE is CHARACTER*1 !> = 'L': form H * C !> = 'R': form C * H !> M !> M is INTEGER !> The number of rows of the matrix C. !> N !> N is INTEGER !> The number of columns of the matrix C. !> V !> V is REAL array, dimension !> (1 + (M-1)*abs(INCV)) if SIDE = 'L' !> or (1 + (N-1)*abs(INCV)) if SIDE = 'R' !> The vector v in the representation of H. V is not used if !> TAU = 0. !> INCV !> INCV is INTEGER !> The increment between elements of v. INCV > 0. !> TAU !> TAU is REAL !> The value tau in the representation of H. !> C !> C is REAL array, dimension (LDC,N) !> On entry, the m by n matrix C. !> On exit, C is overwritten by the matrix H * C if SIDE = 'L', !> or C * H if SIDE = 'R'. !> LDC !> LDC is INTEGER !> The leading dimension of the array C. LDC >= max(1,M). !> WORK !> WORK is REAL array, dimension !> (N) if SIDE = 'L' !> or (M) if SIDE = 'R' !> Author Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Definition at line 126 of file slarf1l.f. Author Generated automatically by Doxygen for LAPACK from the source code. LAPACK Version 3.12.0 SRC/slarf1l.f(3)