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267 Pages

School of Environment
Course Code
Mairi Mac Donald

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NOTE ADDED 14 June 2008
These class notes were used for fifteen years in a discrete math class taught at
Case Western Reserve University until I retired in 1999. I am making them available as
a resource to anyone who wishes to use them. They may be copied and distributed for
educational use, provided that the recipients are charged only the copying costs.
If I were revising these notes today I would make some sizeable changes. The
most important would be to reformulate the definition of division on page 4 to require that
the divisor be nonzero. The result would change the statement “0 divides 0” from true to
false, and would affect the answers to a number of exercises.
I will be glad to receive comments and suggestions at charle[email protected]
Interested readers may wish to look at my other books and websites concerned with
The Abstract Math website
Astounding Math Stories
The Handbook of Mathematical Discourse
Charles Wells
charles (at)
Charles Wells
June 22, 1999
Supported in part bythe Fund for the ImprovementofPost-Secondary Education (Grant
Charles Wells
Case Western ReserveUniversity
10900 Euclid Avenue
Cleveland, OH 44106-7058, USA
Home Page:
1999 byCharles FrederickWells

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Charles Wells Department of Mathematics Case Western Reserve University 10900 Euclid Avenue Cleveland, OH 44106▯7058, USA Email: [email protected] Home Page: Copyright 1999 by Charles Frederick Wells
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