The subject of mathematics is commited to rigorous reasoning. This book aims to raise your confidence in the manipulation and interpretation of formal notations, as well as to train you to solve problems that are fundamentally discrete: problems like chess, in which the moves you make are exact; problems where fields like calculus fail because there's no continuity; problems that appear frequently in games, puzzles, and computer science.

We hope you'll enjoy discovering discrete mathematics here, and we hope you'll find this a good reference for quickly picking up the details you may forget.

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