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Chapters 1-3 have been remixed from the text Math in Society, copyright 2013 David Lippman, used under a CC BY-SA 3.0 license.

Chapter 4 is remixed primarily from Discrete Mathematics: An Open Introduction, copyright 2017 Oscar Levin, used under a CC BY-SA 4.0 license. In addition, some material in chapter 4 is from the Lippman book above.

©2018 Michael Fraboni

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