Authors of extrema.

See also the files THANKS and ChangeLog.

Joseph L. Chuma designed and implemented extrema.

Acknowledgments
===============

EXTREMA has evolved from software developed over the years at TRIUMF, Canada's national
laboratory for particle and nuclear physics.  The need for a general purpose graphics
and analysis package was seen early and the first such program was OPDATA, created,
using FORTRAN, by C.J. Kost, Philip Bennett, and Arthur Haynes.

The next program, PLOTDATA, also in FORTRAN, used many ideas from OPDATA, but had a
different, more user friendly, interface, and was created by Joseph Chuma in 1983.  At
the heart of OPDATA and PLOTDATA was the expression evaluator, but it was limited in
that only element-by-element operations were possible, and variable indices were not
allowed in expressions.  Philip Bennett and Joseph Chuma re-wrote the expression
evaluator, again in FORTRAN, allowing for array operations and indices on variables,
functions, and entire expressions.  This work was incorporated into a new program,
PHYSICA, which also introduced many other new graphics and analysis features. After
a few aborted attempts at creating a GUI for PHYSICA, EXTREMA for Microsoft Windows
was born, followed by EXTREMA for Linux.

EXTREMA was first written completely in C++ by Joe Chuma using Borland C++Builder 5.
This version of EXTREMA has now been ported to Linux using wxWidgets, an open source
cross-platform toolkit.

EXTREMA makes use of the wxWidgets toolkit, which is "a single, easy-to-use API for
writing GUI applications on multiple platforms that still utilize the native platform's
controls and utilities."  Information on the wxWidgets project can be found at 
http://wxwidgets.org