

CLARTG(l) ) CLARTG(l) NAME CLARTG  generate a plane rotation so that [ CS SN ] [ F ] [ R ] [ __ ] SYNOPSIS SUBROUTINE CLARTG( F, G, CS, SN, R ) REAL CS COMPLEX F, G, R, SN PURPOSE CLARTG generates a plane rotation so that [ CS SN ] [ F ] [ R ] [ __ ] . [ ] = [ ] where CS**2 + SN**2 = 1. [ SN CS ] [ G ] [ 0 ] This is a faster version of the BLAS1 routine CROTG, except for the following differences: F and G are unchanged on return. If G=0, then CS=1 and SN=0. If F=0, then CS=0 and SN is chosen so that R is real. ARGUMENTS F (input) COMPLEX The first component of vector to be rotated. G (input) COMPLEX The second component of vector to be rotated. CS (output) REAL The cosine of the rotation. SN (output) COMPLEX The sine of the rotation. R (output) COMPLEX The nonzero component of the rotated vector. FURTHER DETAILS 3596  Modified with a new algorithm by W. Kahan and J. Demmel LAPACK version 3.0 15 June 2000 CLARTG(l)