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)