spttrf.f(3) [debian man page]

spttrf.f(3)							      LAPACK							       spttrf.f(3)

NAME

       spttrf.f -

SYNOPSIS

   Functions/Subroutines
       subroutine spttrf (N, D, E, INFO)
	   SPTTRF

Function/Subroutine Documentation
   subroutine spttrf (integerN, real, dimension( * )D, real, dimension( * )E, integerINFO)
       SPTTRF

       Purpose:

	    SPTTRF computes the L*D*L**T factorization of a real symmetric
	    positive definite tridiagonal matrix A.  The factorization may also
	    be regarded as having the form A = U**T*D*U.

       Parameters:
	   N

		     N is INTEGER
		     The order of the matrix A.  N >= 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 L*D*L**T factorization of A.

	   E

		     E is REAL 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**T factorization of A.
		     E can also be regarded as the superdiagonal of the unit
		     bidiagonal factor U from the U**T*D*U factorization of A.

	   INFO

		     INFO is INTEGER
		     = 0: successful exit
		     < 0: if INFO = -k, the k-th argument had an illegal value
		     > 0: if INFO = k, the leading minor of order k is not
			  positive definite; if k < N, the factorization could not
			  be completed, while if k = N, the factorization was
			  completed, but D(N) <= 0.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Definition at line 92 of file spttrf.f.

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

Version 3.4.1							  Sun May 26 2013						       spttrf.f(3)

cpttrf.f(3)							      LAPACK							       cpttrf.f(3)

NAME

       cpttrf.f -

SYNOPSIS

   Functions/Subroutines
       subroutine cpttrf (N, D, E, INFO)
	   CPTTRF

Function/Subroutine Documentation
   subroutine cpttrf (integerN, real, dimension( * )D, complex, dimension( * )E, integerINFO)
       CPTTRF

       Purpose:

	    CPTTRF computes the L*D*L**H factorization of a complex Hermitian
	    positive definite tridiagonal matrix A.  The factorization may also
	    be regarded as having the form A = U**H *D*U.

       Parameters:
	   N

		     N is INTEGER
		     The order of the matrix A.  N >= 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 L*D*L**H factorization of A.

	   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.

	   INFO

		     INFO is INTEGER
		     = 0: successful exit
		     < 0: if INFO = -k, the k-th argument had an illegal value
		     > 0: if INFO = k, the leading minor of order k is not
			  positive definite; if k < N, the factorization could not
			  be completed, while if k = N, the factorization was
			  completed, but D(N) <= 0.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 93 of file cpttrf.f.

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

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