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Roger Nelsen '64 Co-Authors When Less is More: Visualizing Basic Inequalities

May 31, 2009

Roger Nelsen when less.jpgMay 31, 2009, Greencastle, Ind. — Roger B. Nelsen, professor of mathematics at Lewis & Clark College and 1964 graduate of DePauw University, is co-author of When Less is More: Visualizing Basic Inequalities. Published by the Mathematical Association, the book is part of the Dolciani Mathematical Expositions series.

"Inequalities permeate mathematics, from the Elements of Euclid to operations research and financial mathematics," notes a synopsis of the book. "Yet too often the emphasis is on things equal to one another rather than unequal. While equalities and identities are without doubt important, they don't possess the richness and variety that one finds with inequalities. The objective of this book is to illustrate how use of visualization can be a powerful tool for better understanding some basic mathematical inequalities. Drawing pictures is a well-known method for problem solving, and we would like to convince you that the same is true when working with inequalities. We show how to produce figures in a systematic way for the illustration of inequalities; androger b nelsen.jpg open new avenues to creative ways of thinking and teaching. In addition, a geometric argument can not only show two things unequal, but also help the observer see just how unequal they are."

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