1DLAR2V(1)           LAPACK auxiliary routine (version 3.1)           DLAR2V(1)
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NAME

6       DLAR2V - a vector of real plane rotations from both sides to a sequence
7       of 2-by-2 real symmetric matrices, defined by the elements of the  vec‐
8       tors x, y and z
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SYNOPSIS

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

18       DLAR2V  applies  a  vector of real plane rotations from both sides to a
19       sequence of 2-by-2 real symmetric matrices, defined by the elements  of
20       the vectors x, y and z. For i = 1,2,...,n
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22          ( x(i)  z(i) ) := (  c(i)  s(i) ) ( x(i)  z(i) ) ( c(i) -s(i) )
23          ( z(i)  y(i) )    ( -s(i)  c(i) ) ( z(i)  y(i) ) ( s(i)  c(i) )
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ARGUMENTS

27       N       (input) INTEGER
28               The number of plane rotations to be applied.
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30       X       (input/output) DOUBLE PRECISION array,
31               dimension (1+(N-1)*INCX) The vector x.
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33       Y       (input/output) DOUBLE PRECISION array,
34               dimension (1+(N-1)*INCX) The vector y.
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36       Z       (input/output) DOUBLE PRECISION array,
37               dimension (1+(N-1)*INCX) The vector z.
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39       INCX    (input) INTEGER
40               The increment between elements of X, Y and Z. INCX > 0.
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42       C       (input) DOUBLE PRECISION array, dimension (1+(N-1)*INCC)
43               The cosines of the plane rotations.
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45       S       (input) DOUBLE PRECISION array, dimension (1+(N-1)*INCC)
46               The sines of the plane rotations.
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48       INCC    (input) INTEGER
49               The increment between elements of C and S. INCC > 0.
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53 LAPACK auxiliary routine (versionNo3v.e1m)ber 2006                       DLAR2V(1)