spttrs.f(3) [centos man page]

spttrs.f(3)							      LAPACK							       spttrs.f(3)

NAME

       spttrs.f -

SYNOPSIS

   Functions/Subroutines
       subroutine spttrs (N, NRHS, D, E, B, LDB, INFO)
	   SPTTRS

Function/Subroutine Documentation
   subroutine spttrs (integerN, integerNRHS, real, dimension( * )D, real, dimension( * )E, real, dimension( ldb, * )B, integerLDB, integerINFO)
       SPTTRS

       Purpose:

	    SPTTRS solves a tridiagonal system of the form
	       A * X = B
	    using the L*D*L**T factorization of A computed by SPTTRF.  D is a
	    diagonal matrix specified in the vector D, L is a unit bidiagonal
	    matrix whose subdiagonal is specified in the vector E, and X and B
	    are N by NRHS matrices.

       Parameters:
	   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
		     L*D*L**T factorization of A.

	   E

		     E is REAL array, dimension (N-1)
		     The (n-1) subdiagonal elements of the unit bidiagonal factor
		     L from the L*D*L**T factorization of A.  E can also be regarded
		     as the superdiagonal of the unit bidiagonal factor U from the
		     factorization A = U**T*D*U.

	   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 110 of file spttrs.f.

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

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