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ZLARTG(l)) ZLARTG(l)NAMEZLARTG - generate a plane rotation so that [ CS SN ] [ F ] [ R ] [ __ ]SYNOPSISSUBROUTINE ZLARTG( F, G, CS, SN, R ) DOUBLE PRECISION CS COMPLEX*16 F, G, R, SNPURPOSEZLARTG generates a plane rotation so that [ CS SN ] [ F ] [ R ] [ __ ] . [ ] = [ ] where CS**2 + |SN|**2 = 1. [CS ] [ G ] [ 0 ] This is a faster version of the BLAS1 routine ZROTG, 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.-SNARGUMENTSF (input) COMPLEX*16 The first component of vector to be rotated. G (input) COMPLEX*16 The second component of vector to be rotated. CS (output) DOUBLE PRECISION The cosine of the rotation. SN (output) COMPLEX*16 The sine of the rotation. R (output) COMPLEX*16 The nonzero component of the rotated vector.FURTHER DETAILS3-5-96 - Modified with a new algorithm by W. Kahan and J. DemmelLAPACK version 3.015 June 2000 ZLARTG(l)

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