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NAME
crot.f -
SYNOPSIS
Functions/Subroutines subroutine crot (N, CX, INCX, CY, INCY, C, S) CROT applies a plane rotation with real cosine and complex sine to a pair of complex vectors.
Function/Subroutine Documentation
subroutine crot (integer N, complex, dimension( * ) CX, integer INCX, complex, dimension( * ) CY, integer INCY, real C, complex S) CROT applies a plane rotation with real cosine and complex sine to a pair of complex vectors. Purpose: CROT applies a plane rotation, where the cos (C) is real and the sin (S) is complex, and the vectors CX and CY are complex. Parameters: N N is INTEGER The number of elements in the vectors CX and CY. CX CX is COMPLEX array, dimension (N) On input, the vector X. On output, CX is overwritten with C*X + S*Y. INCX INCX is INTEGER The increment between successive values of CY. INCX <> 0. CY CY is COMPLEX array, dimension (N) On input, the vector Y. On output, CY is overwritten with -CONJG(S)*X + C*Y. INCY INCY is INTEGER The increment between successive values of CY. INCX <> 0. C C is REAL S S is COMPLEX C and S define a rotation [ C S ] [ -conjg(S) C ] where C*C + S*CONJG(S) = 1.0. Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: September 2012
Author
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