Module DPTTRF.C in CLAPACK

General Information

Computes the LDL**H factorization of a real symmetric positive definite tridiagonal matrix. (Computational routine.). [C version of LAPACK routine, converted from Fortran by f2c.].

Usage

int dpttrf_(integer *n, doublereal *d, doublereal *e, integer *info)

Classification

D2b2a

Solution of systems of linear equations, including matrix inverses, and LU and related factorizations (real symmetric tridiagonal matrices)

Type

subroutine in CLAPACK package (DOUBLE sublibrary)

Language

C

Availability

Public domain, Portable

Precision

Double Precision

Alternates

SPTTRF.C

Single Precision

Download from NETLIB; Public access repository

Location

The University of Tennessee at Knoxville and Bell Laboratories

Contact

Jack Dongarra, ORNL (dongarra@cs.utk.edu) and Eric Grosse, Bell Labs (ehg@research.att.com)