Provided by: liblapack-doc_3.3.1-1_all bug

NAME

       LAPACK-3  - 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

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 factorization 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 routine (version 3.3.1)             April 2011                            SPPTRS(3lapack)