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sopgtr.f(3)				      LAPACK				      sopgtr.f(3)

NAME
       sopgtr.f -

SYNOPSIS
   Functions/Subroutines
       subroutine sopgtr (UPLO, N, AP, TAU, Q, LDQ, WORK, INFO)
	   SOPGTR

Function/Subroutine Documentation
   subroutine sopgtr (characterUPLO, integerN, real, dimension( * )AP, real, dimension( * )TAU,
       real, dimension( ldq, * )Q, integerLDQ, real, dimension( * )WORK, integerINFO)
       SOPGTR

       Purpose:

	    SOPGTR generates a real orthogonal matrix Q which is defined as the
	    product of n-1 elementary reflectors H(i) of order n, as returned by
	    SSPTRD using packed storage:

	    if UPLO = 'U', Q = H(n-1) . . . H(2) H(1),

	    if UPLO = 'L', Q = H(1) H(2) . . . H(n-1).

       Parameters:
	   UPLO

		     UPLO is CHARACTER*1
		     = 'U': Upper triangular packed storage used in previous
			    call to SSPTRD;
		     = 'L': Lower triangular packed storage used in previous
			    call to SSPTRD.

	   N

		     N is INTEGER
		     The order of the matrix Q. N >= 0.

	   AP

		     AP is REAL array, dimension (N*(N+1)/2)
		     The vectors which define the elementary reflectors, as
		     returned by SSPTRD.

	   TAU

		     TAU is REAL array, dimension (N-1)
		     TAU(i) must contain the scalar factor of the elementary
		     reflector H(i), as returned by SSPTRD.

	   Q

		     Q is REAL array, dimension (LDQ,N)
		     The N-by-N orthogonal matrix Q.

	   LDQ

		     LDQ is INTEGER
		     The leading dimension of the array Q. LDQ >= max(1,N).

	   WORK

		     WORK is REAL array, dimension (N-1)

	   INFO

		     INFO is INTEGER
		     = 0:  successful exit
		     < 0:  if INFO = -i, the i-th argument had an illegal value

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Definition at line 115 of file sopgtr.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2				 Tue Sep 25 2012			      sopgtr.f(3)
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