A flexible program for performing analytic differentiation and substitutions on a system of equations

Published: 1 January 1981| Version 1 | DOI: 10.17632/3xhdfn87t9.1
Daniel W. Merdes, Josef Pliva


Title of program: EQSYSTM Catalogue Id: AAQX_v1_0 Nature of problem This program is designed to operate on a system of equations, making user-specified substitutions and returning for each expression its partial derivatives with respect to a list of specified variables. The output expressions for the derivatives of each input expression, in the form of statements directly usable in other programs, are organized into an array with subscripts corresponding to the variables by which it was differentiated. Output in either PL/1, Fortran, or SAS syntax is available a ... Versions of this program held in the CPC repository in Mendeley Data AAQX_v1_0; EQSYSTM; 10.1016/0010-4655(81)90085-0 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)



Computational Physics, Computer Algebra System, Computational Method