SRC/dpptrs.f(3) Library Functions Manual SRC/dpptrs.f(3) NAME SRC/dpptrs.f SYNOPSIS Functions/Subroutines subroutine dpptrs (uplo, n, nrhs, ap, b, ldb, info) DPPTRS Function/Subroutine Documentation subroutine dpptrs (character uplo, integer n, integer nrhs, double precision, dimension( * ) ap, double precision, dimension( ldb, * ) b, integer ldb, integer info) DPPTRS Purpose: !> !> DPPTRS 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 DPPTRF. !> 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 DOUBLE PRECISION 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 DOUBLE PRECISION 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 dpptrs.f. Author Generated automatically by Doxygen for LAPACK from the source code. LAPACK Version 3.12.0 SRC/dpptrs.f(3)