# Accession Number:

## ADA011039

# Title:

## CSKYDG2: An Out-of-Core Choleksy Algorithm Equation Solver (With Respect to Profile) for Large Positive Definite Systems of Linear Equations,

# Descriptive Note:

# Corporate Author:

## NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD

# Personal Author(s):

# Report Date:

## 1975-03-01

# Pagination or Media Count:

## 37.0

# Abstract:

In the finite element approach to static structural analysis the solution of the equation KU P is basic. However, the order of K is often so large that, even when the symmetry and banded structure of K are taken into account the storage of K in the core memory of a computer may not be feasible or even possible. To handle such a case, the computer program CSKYDG2 has been developed. CSKYDG2 is an out-of-core Cholesky algorithm solver for positive definite systems of simultaneous linear equations. CSKYDG2, which takes the profile approach, uses SETUP, a preprocessor program which stores the profile of the upper triangular half of the matrix K in random access files. CSKYDG2 and SETUP are written in FORTRAN Extended for the CDC 6000 series of computers.

# Descriptors:

# Subject Categories:

- Theoretical Mathematics
- Computer Programming and Software