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RedHat 9 (Linux i386) - man page for cpptrs (redhat section l)

CPPTRS(l)					)					CPPTRS(l)

NAME
       CPPTRS  -  solve  a  system of linear equations A*X = B with a Hermitian positive definite
       matrix A in packed storage using the Cholesky factorization A = U**H*U or A = L*L**H  com-
       puted by CPPTRF

SYNOPSIS
       SUBROUTINE CPPTRS( UPLO, N, NRHS, AP, B, LDB, INFO )

	   CHARACTER	  UPLO

	   INTEGER	  INFO, LDB, N, NRHS

	   COMPLEX	  AP( * ), B( LDB, * )

PURPOSE
       CPPTRS  solves  a  system  of  linear equations A*X = B with a Hermitian positive definite
       matrix A in packed storage using the Cholesky factorization A = U**H*U or A = L*L**H  com-
       puted by CPPTRF.

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) COMPLEX array, dimension (N*(N+1)/2)
	       The triangular factor U or L from the Cholesky factorization A =  U**H*U  or  A	=
	       L*L**H,	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) COMPLEX 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 				CPPTRS(l)


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