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CentOS 7.0 - man page for clartg.f (centos section 3)

clartg.f(3)						LAPACK						  clartg.f(3)

clartg.f -
Functions/Subroutines subroutine clartg (F, G, CS, SN, R) CLARTG generates a plane rotation with real cosine and complex sine. Function/Subroutine Documentation subroutine clartg (complexF, complexG, realCS, complexSN, complexR) CLARTG generates a plane rotation with real cosine and complex sine. 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. Parameters: F F is COMPLEX The first component of vector to be rotated. G G is COMPLEX The second component of vector to be rotated. CS CS is REAL The cosine of the rotation. SN SN is COMPLEX The sine of the rotation. R R is COMPLEX The nonzero component of the rotated vector. Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: September 2012 Further Details: 3-5-96 - Modified with a new algorithm by W. Kahan and J. Demmel This version has a few statements commented out for thread safety (machine parameters are computed on each entry). 10 feb 03, SJH. Definition at line 104 of file clartg.f. Author Generated automatically by Doxygen for LAPACK from the source code. Version 3.4.2 Tue Sep 25 2012 clartg.f(3)

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