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# Accession Number:

## ADA063473

# Title:

## Test Procedure - Linear Equation Routines.

# Descriptive Note:

## Technical memo.,

# Corporate Author:

## NAVAL WEAPONS CENTER CHINA LAKE CALIF

# Report Date:

## 1975-03-01

# Pagination or Media Count:

##
35.0

# Abstract:

## The general test procedure is to apply each candidate routine to a number of test problems with known answers and to record the resulting accuracy and execution time. It is assumed that each candidate routine can solve the problem AXB where A is a general n x n coefficient matrix, B is a general n x m right-hand-side matrix, and X is an n x m solution matrix. If B is set equal to the n x n identity matrix I so that m n, then X will be an approximation to 1A. The accuracy achieved can be measured by computing the norm of the residual matrix R AX - I or R XA - I or better, by computing the norm of the error matrix E X - 1A. This approach is used in order to avoid having to solve the first equation repeatedly using various right-hand sides B for each test matrix A. Execution time is measured by the system clock. Author

# Distribution Statement:

## APPROVED FOR PUBLIC RELEASE

#