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dlar2v.f(3) | LAPACK | dlar2v.f(3) |
NAME¶
dlar2v.f -SYNOPSIS¶
Functions/Subroutines¶
subroutine dlar2v (N, X, Y, Z, INCX, C, S, INCC)
Function/Subroutine Documentation¶
subroutine dlar2v (integerN, double precision, dimension( * )X, double precision, dimension( * )Y, double precision, dimension( * )Z, integerINCX, double precision, dimension( * )C, double precision, dimension( * )S, integerINCC)¶
DLAR2V applies a vector of plane rotations with real cosines and real sines from both sides to a sequence of 2-by-2 symmetric/Hermitian matrices. Purpose:DLAR2V applies a vector of real plane rotations from both sides to a sequence of 2-by-2 real symmetric matrices, defined by the elements of the vectors x, y and z. For i = 1,2,...,n ( x(i) z(i) ) := ( c(i) s(i) ) ( x(i) z(i) ) ( c(i) -s(i) ) ( z(i) y(i) ) ( -s(i) c(i) ) ( z(i) y(i) ) ( s(i) c(i) )
N
Author:
N is INTEGER The number of plane rotations to be applied.X
X is DOUBLE PRECISION array, dimension (1+(N-1)*INCX) The vector x.Y
Y is DOUBLE PRECISION array, dimension (1+(N-1)*INCX) The vector y.Z
Z is DOUBLE PRECISION array, dimension (1+(N-1)*INCX) The vector z.INCX
INCX is INTEGER The increment between elements of X, Y and Z. INCX > 0.C
C is DOUBLE PRECISION array, dimension (1+(N-1)*INCC) The cosines of the plane rotations.S
S is DOUBLE PRECISION array, dimension (1+(N-1)*INCC) The sines of the plane rotations.INCC
INCC is INTEGER The increment between elements of C and S. INCC > 0.
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
September 2012
Definition at line 111 of file dlar2v.f.
Author¶
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