cptsv.f(3)							      LAPACK								cptsv.f(3)

NAME

       cptsv.f -

SYNOPSIS

   Functions/Subroutines
       subroutine cptsv (N, NRHS, D, E, B, LDB, INFO)
	    CPTSV computes the solution to system of linear equations A * X = B for PT matrices

Function/Subroutine Documentation
   subroutine cptsv (integerN, integerNRHS, real, dimension( * )D, complex, dimension( * )E, complex, dimension( ldb, * )B, integerLDB,
       integerINFO)
	CPTSV computes the solution to system of linear equations A * X = B for PT matrices

       Purpose:

	    CPTSV computes the solution to a complex system of linear equations
	    A*X = B, where A is an N-by-N Hermitian positive definite tridiagonal
	    matrix, and X and B are N-by-NRHS matrices.

	    A is factored as A = L*D*L**H, and the factored form of A is then
	    used to solve the system of equations.

       Parameters:
	   N

		     N is INTEGER
		     The order of the 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)
		     On entry, the n diagonal elements of the tridiagonal matrix
		     A.  On exit, the n diagonal elements of the diagonal matrix
		     D from the factorization A = L*D*L**H.

	   E

		     E is COMPLEX array, dimension (N-1)
		     On entry, the (n-1) subdiagonal elements of the tridiagonal
		     matrix A.	On exit, the (n-1) subdiagonal elements of the
		     unit bidiagonal factor L from the L*D*L**H factorization of
		     A.  E can also be regarded as the superdiagonal of the unit
		     bidiagonal factor U from the U**H*D*U factorization of A.

	   B

		     B is COMPLEX array, dimension (LDB,NRHS)
		     On entry, the N-by-NRHS right hand side matrix B.
		     On exit, if INFO = 0, the N-by-NRHS solution matrix 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 = -i, the i-th argument had an illegal value
		     > 0:  if INFO = i, the leading minor of order i is not
			   positive definite, and the solution has not been
			   computed.  The factorization has not been completed
			   unless i = N.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 116 of file cptsv.f.

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

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