This book consists of three parts: fundamental knowledge, basic methods and typical problems. These three parts introduce the fundamental knowledge of solving combinatorial problems, the important solutions to combinatorial problems and some typical problems with often-used solutions in the high school mathematical competition respectively.
In each chapter there are necessary examples and exercises with solutions. These examples and exercises are of the same level of difficulty as the China Mathematical League Competitions which are selected from mathematical competitions at home and abroad in recent years. Some test questions are created by the author himself and a few easy questions in China Mathematical Olympiad (CMO) and IMO are also included. In this book, the author pay attention to leading readers to explore, analyze and summarize the ideas and methods of solving combinatorial problems. The readers\' mathematical concepts and abilities will be improved remarkably after acquiring knowledge from this book.
【目录】
Introduction
Preface
PART ONE Fundamental Knowledge
Chapter 1 Principles and Formulas of Counting
Exercise 1
Chapter 2 Pigeonhole Principle and Mean Value Principle
Exercise 2
Chapter 3 The Generating Functions
Exercise 3
Chapter 4 Recurrence Sequence of Numbers
Exercise 4
PART TWO Basic Method
Chapter 5 Classification and Method of Fractional Steps
Exercise 5
Chapter 6 Correspondent Method
Exercise 6
Chapter 7 Counting in Two Ways
Exercise 7
Chapter 8 Recurrence Method
Exercise 8
Chapter 9 Coloring Method and Evaluation Method
Exercise 9
Chapter 10 Reduction to Absurdity and the Extreme Principle
Exercise 10
Chapter 11 Local Adjustment Method
Exercise 11
Chapter 12 Construction Method
Exercise 12
PART THREE Typical Problems
Chapter 13 Combinatorial Counting Problems
Exercise 13
Chapter 14 Existence Problems and the Proofs of Inequalities in Combinatorial Problems
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