Provided by: liblapack-doc_3.3.1-1_all

**NAME**

LAPACK-3 - 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

**SYNOPSIS**

SUBROUTINE DLAR2V( N, X, Y, Z, INCX, C, S, INCC ) INTEGER INCC, INCX, N DOUBLE PRECISION C( * ), S( * ), X( * ), Y( * ), Z( * )

**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) )

**ARGUMENTS**

N (input) INTEGER The number of plane rotations to be applied. X (input/output) DOUBLE PRECISION array, dimension (1+(N-1)*INCX) The vector x. Y (input/output) DOUBLE PRECISION array, dimension (1+(N-1)*INCX) The vector y. Z (input/output) DOUBLE PRECISION array, dimension (1+(N-1)*INCX) The vector z. INCX (input) INTEGER The increment between elements of X, Y and Z. INCX > 0. C (input) DOUBLE PRECISION array, dimension (1+(N-1)*INCC) The cosines of the plane rotations. S (input) DOUBLE PRECISION array, dimension (1+(N-1)*INCC) The sines of the plane rotations. INCC (input) INTEGER The increment between elements of C and S. INCC > 0. LAPACK auxiliary routine (version 3.2) April 2011 DLAR2V(3lapack)