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cpttrs.f(3)				      LAPACK				      cpttrs.f(3)

NAME
       cpttrs.f -

SYNOPSIS
   Functions/Subroutines
       subroutine cpttrs (UPLO, N, NRHS, D, E, B, LDB, INFO)
	   CPTTRS

Function/Subroutine Documentation
   subroutine cpttrs (characterUPLO, integerN, integerNRHS, real, dimension( * )D, complex,
       dimension( * )E, complex, dimension( ldb, * )B, integerLDB, integerINFO)
       CPTTRS

       Purpose:

	    CPTTRS solves a tridiagonal system of the form
	       A * X = B
	    using the factorization A = U**H*D*U or A = L*D*L**H computed by CPTTRF.
	    D is a diagonal matrix specified in the vector D, U (or L) is a unit
	    bidiagonal matrix whose superdiagonal (subdiagonal) is specified in
	    the vector E, and X and B are N by NRHS matrices.

       Parameters:
	   UPLO

		     UPLO is CHARACTER*1
		     Specifies the form of the factorization and whether the
		     vector E is the superdiagonal of the upper bidiagonal factor
		     U or the subdiagonal of the lower bidiagonal factor L.
		     = 'U':  A = U**H*D*U, E is the superdiagonal of U
		     = 'L':  A = L*D*L**H, E is the subdiagonal of L

	   N

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

	   NRHS

		     NRHS is INTEGER
		     The number of right hand sides, i.e., the number of columns
		     of the matrix B.  NRHS >= 0.

	   D

		     D is REAL array, dimension (N)
		     The n diagonal elements of the diagonal matrix D from the
		     factorization A = U**H*D*U or A = L*D*L**H.

	   E

		     E is COMPLEX array, dimension (N-1)
		     If UPLO = 'U', the (n-1) superdiagonal elements of the unit
		     bidiagonal factor U from the factorization A = U**H*D*U.
		     If UPLO = 'L', the (n-1) subdiagonal elements of the unit
		     bidiagonal factor L from the factorization A = L*D*L**H.

	   B

		     B is REAL array, dimension (LDB,NRHS)
		     On entry, the right hand side vectors B for the system of
		     linear equations.
		     On exit, the solution vectors, X.

	   LDB

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

	   INFO

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

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 122 of file cpttrs.f.

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

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