### About The Author

#### Howard Anton

**Dr. Howard Anton** obtained his B.A. from Lehigh University, his M.A. from the University of Illinois, and his Ph.D. from the Polytechnic Institute of Brooklyn, all in maths. He worked in the manned space program at Cape Canaveral in the early 1960's. In 1968 he became a research professor of mathematics at Drexel University in Philadelphia, where Anton taught and did mathematical research for 15 years. In 1983 he left Drexel as a Professor Emeritus of Mathematics to become a full-time writer of math textbooks. There are now more than 150 versions of his textbooks in print, including translations into Arabic, Portuguese, Spanish, German, Italian, Chinese, Japanese, French, Hebrew, and Indonesian. Anton was awarded a Textbook Excellence Award in 1994 by the Textbook Authors Association, and in 2011 that organization awarded his Elementary Linear Algebra text its McGuffey Award.

#### Irl C. Bivens

**Professor Irl C. Bivens**, recipient of the Merten M. Hasse Prize for Expository Writing in Mathematics and the George Polya Award, received his A.B. from Pfeiffer College and his Ph.D. from the University of North Carolina at Chapel Hill, both in mathematics. Since 1982, Dr. Biven has taught at Davidson College, where he currently holds the position of professor of mathematics. A typical academic year sees him teaching courses in topology, geometry and calculus. He also enjoys mathematical history, and his annual History of Mathematics seminar is a perennial favorite with Davidson mathematics majors.

Dr. Bivens has published numerous articles on undergraduate mathematics, as well as research papers in his specialty, differential geometry. He has served on the editorial boards of The College Mathematics Journal and the MAA Problem Book series and is a reviewer for Mathematical Reviews. When he is not pursuing mathematics, Professor Irl enjoys walking, swimming, juggling, and spending time with his son Robert.

#### Stephen Davis

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