SRC/spptrs.f(3)            Library Functions Manual            SRC/spptrs.f(3)

NAME
       SRC/spptrs.f

SYNOPSIS
   Functions/Subroutines
       subroutine spptrs (uplo, n, nrhs, ap, b, ldb, info)
           SPPTRS

Function/Subroutine Documentation
   subroutine spptrs (character uplo, integer n, integer nrhs, real,
       dimension( * ) ap, real, dimension( ldb, * ) b, integer ldb, integer
       info)
       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.

       Definition at line 107 of file spptrs.f.

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

LAPACK                          Version 3.12.0                 SRC/spptrs.f(3)