CPTTS2 man page on Oracle

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cptts2.f(3)			    LAPACK			   cptts2.f(3)

       cptts2.f -

       subroutine cptts2 (IUPLO, N, NRHS, D, E, B, LDB)
	   CPTTS2 solves a tridiagonal system of the form AX=B using the L D
	   LH factorization computed by spttrf.

Function/Subroutine Documentation
   subroutine cptts2 (integerIUPLO, integerN, integerNRHS, real, dimension( *
       )D, complex, dimension( * )E, complex, dimension( ldb, * )B,
       CPTTS2 solves a tridiagonal system of the form AX=B using the L D LH
       factorization computed by spttrf.


	    CPTTS2 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.


		     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.
		     = 1:  A = U**H *D*U, E is the superdiagonal of U
		     = 0:  A = L*D*L**H, E is the subdiagonal of L


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


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


		     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 is COMPLEX array, dimension (N-1)
		     If IUPLO = 1, the (n-1) superdiagonal elements of the unit
		     bidiagonal factor U from the factorization A = U**H*D*U.
		     If IUPLO = 0, the (n-1) subdiagonal elements of the unit
		     bidiagonal factor L from the factorization A = L*D*L**H.


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

	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

	   September 2012

       Definition at line 114 of file cptts2.f.

       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2			Tue Sep 25 2012			   cptts2.f(3)

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