Our authors are long-time associates of MacKichan Software and valuable contributors to our products. Carol Walker and Darel Hardy are authors of the Doing Mathematics series that accompanies our software. Their most recent edition is Doing Mathematics with Scientific WorkPlace and Scientific Notebook Version 5. They are also the authors of Applied Algebra: Codes, Ciphers, and Discrete Algorithms (Prentice Hall, 2003). Joining them as co-authors of the CD-based Calculus: Understanding Its Concepts and Methods are Fred Richman and Robert Wisner.

**Darel Hardy **received a Ph.D. in Mathematics in 1967 from New
Mexico State University. His research specialties are in algebra and
semigroups. He taught mathematics at Colorado State University from 1967 until
his retirement in 2004. He was a Professor of Mathematics and a member of the
Center for Science, Mathematics and Technology Education (CSMATE). Dr. Hardy
was a Co-Director of the Colorado Integrated Mathematics Initiative, a CSMATE
program designed to support mathematics reform in secondary mathematics in
Colorado. He was the first director of CSU Math Day, which each year since
1977 has attracted several hundred secondary mathematics students to the
Colorado State University campus for a day of mathematics competition. His
publications include Basic Calculus (Brooks/Cole,
1975).

**Fred Richman** received an AB from Princeton University in 1958
and a Ph.D. from the University of Chicago in 1963. He taught at New Mexico
State University from 1963 to 1990, worked at TCI Software Research from 1990
to 1991, and has been teaching at Florida Atlantic University since 1991. He
has also worked sporadically at the Center for Communications Research in
Princeton. He has written or co-authored over 100 research papers,
mostly in constructive mathematics and in abelian group theory. He is the
author of the textbook Number theory: an introduction to
algebra and, with Bernard L. Johnston, of the textbook
Numbers and symmetry. He worked as a programmer on
early versions of Scientific WorkPlace.

**Carol Walker **received a Ph.D. in Mathematics in 1963 from New
Mexico State University. Her research specialties are infinite abelian groups,
applications of category theory and homological algebra, and algebraic aspects
of fuzzy sets and fuzzy logic. Dr. Walker was a faculty member at New Mexico
State University from 1964 until her retirement in August 1996, teaching
mathematics, serving as Head of the Department of Mathematical Sciences, and
as Associate Dean of the College of Arts and Sciences. In addition to the
above, her publications include College Trigonometry
(Scott, Foresman, 1970) with co-authors Fred Richman and Elbert Walker;
Mathematics for the Liberal Arts Student
(Brooks/Cole, 1967) with co-authors Fred Richman and Robert Wisner;
Mathematics for Liberal Arts, Fifth Edition
(Kendall Hunt, 2006) with co-authors Fred Richman, Robert Wisner and
James Brewer; and A First Course in Fuzzy and Neural
Control (Chapman Hall/CRC 2003) with co-authors Hung Nguyen, Ram
Prasad, and Elbert Walker.

**Robert J. Wisner** received a Ph.D. in Mathematics in 1953 from
the University of Washington. His mathematics research publications include
group theory, combinatorics, and number theory. He has been on mathematics
faculties of the University of British Columbia, Haverford College, and New
Mexico State University, teaching the subject for 50 years until his
retirement. He has authored or co-authored numerous books on, among other
things, number theory and probability theory, in addition to a very early
computer-oriented calculus book as well as books for high-school algebra.
Also, for some 20 years, he was one of the authors of various K-8 mathematics
programs for the Scott, Foresman Publishing Co., and for 24 years was the
Consulting Editor in Mathematics for the Brooks/Cole Publishing Co. His
second-most-recent book is the Fifth Edition of
Mathematics for Liberal Arts (Kendall Hunt, 2006),
with Fred Richman, Carol Walker, and James Brewer, and his most recent
co-authored book is the electronic textbook Calculus:
Understanding Its Concepts and Methods, published by MacKichan
Software, Inc.

This document was created with Scientific WorkPlace.