spptrs(3) [debian man page]

spptrs.f(3)							      LAPACK							       spptrs.f(3)

NAME

       spptrs.f -

SYNOPSIS

   Functions/Subroutines
       subroutine spptrs (UPLO, N, NRHS, AP, B, LDB, INFO)
	   SPPTRS

Function/Subroutine Documentation
   subroutine spptrs (characterUPLO, integerN, integerNRHS, real, dimension( * )AP, real, dimension( ldb, * )B, integerLDB, integerINFO)
       SPPTRS

       Purpose:

	    SPPTRS solves a system of linear equations A*X = B with a symmetric
	    positive definite matrix A in packed storage using the Cholesky
	    factorization A = U**T*U or A = L*L**T computed by SPPTRF.

       Parameters:
	   UPLO

		     UPLO is CHARACTER*1
		     = 'U':  Upper triangle of A is stored;
		     = 'L':  Lower triangle of A is stored.

	   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.

	   AP

		     AP is REAL array, dimension (N*(N+1)/2)
		     The triangular factor U or L from the Cholesky factorization
		     A = U**T*U or A = L*L**T, packed columnwise in a linear
		     array.  The j-th column of U or L is stored in the array AP
		     as follows:
		     if UPLO = 'U', AP(i + (j-1)*j/2) = U(i,j) for 1<=i<=j;
		     if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = L(i,j) for j<=i<=n.

	   B

		     B is REAL array, dimension (LDB,NRHS)
		     On entry, the right hand side matrix B.
		     On exit, the 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

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Definition at line 109 of file spptrs.f.

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

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

Check Out this Related Man Page

SPPTRS(l)								 )								 SPPTRS(l)

NAME

       SPPTRS  -  solve a system of linear equations A*X = B with a symmetric positive definite matrix A in packed storage using the Cholesky fac-
       torization A = U**T*U or A = L*L**T computed by SPPTRF

SYNOPSIS

       SUBROUTINE SPPTRS( UPLO, N, NRHS, AP, B, LDB, INFO )

	   CHARACTER	  UPLO

	   INTEGER	  INFO, LDB, N, NRHS

	   REAL 	  AP( * ), B( LDB, * )

PURPOSE

       SPPTRS solves a system of linear equations A*X = B with a symmetric positive definite matrix A in packed storage using the Cholesky factor-
       ization A = U**T*U or A = L*L**T computed by SPPTRF.

ARGUMENTS

       UPLO    (input) CHARACTER*1
	       = 'U':  Upper triangle of A is stored;
	       = 'L':  Lower triangle of A is stored.

       N       (input) INTEGER
	       The order of the matrix A.  N >= 0.

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

       AP      (input) REAL array, dimension (N*(N+1)/2)
	       The triangular factor U or L from the Cholesky factorization A = U**T*U or A = L*L**T, packed columnwise in a linear array.  The j-
	       th column of U or L is stored in the array AP as follows: if UPLO = 'U', AP(i + (j-1)*j/2) = U(i,j) for 1<=i<=j;  if  UPLO  =  'L',
	       AP(i + (j-1)*(2n-j)/2) = L(i,j) for j<=i<=n.

       B       (input/output) REAL array, dimension (LDB,NRHS)
	       On entry, the right hand side matrix B.	On exit, the solution matrix X.

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

       INFO    (output) INTEGER
	       = 0:  successful exit
	       < 0:  if INFO = -i, the i-th argument had an illegal value

LAPACK version 3.0						   15 June 2000 							 SPPTRS(l)

Linux and UNIX Man Pages

spptrs(3) [debian man page]

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