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| Preface | p. xi |
| Mathematics and Mathematical Activity | p. 1 |
| What Is Mathematics? | p. 1 |
| Mathematical Research and Problem Solving | p. 2 |
| An Example of a Mathematical Research Situation | p. 3 |
| Conjectures and Theorems | p. 5 |
| Methods of Reasoning | p. 5 |
| Why Do We Need Proofs? | p. 7 |
| Mathematical Writing | p. 8 |
| Reading a Mathema... MORE | p. 9 |
| Problems | p. 11 |
| Sets, Numbers, and Axioms | p. 15 |
| Sets and Numbers from an Intuitive Perspective | p. 15 |
| Set Equality and Set Inclusion | p. 23 |
| Venn Diagrams and Set Operations | p. 31 |
| Undefined Notions and Axioms of Set Theory | p. 45 |
| Axioms for the Real Numbers | p. 50 |
| Problems | p. 56 |
| Elementary Logic | p. 69 |
| Statements and Truth | p. 69 |
| Truth Tables and Statement Forms | p. 80 |
| Logical Equivalence | p. 86 |
| Arguments and Validity | p. 91 |
| Statements Involving Quantifiers | p. 98 |
| Problems | p. 106 |
| Planning and Writing Proofs | p. 117 |
| The Proof-Writing Context | p. 117 |
| Proving an If… Then Statement | p. 122 |
| Proving a For All Statement | p. 129 |
| The Know/Show Approach to Developing Proofs | p. 136 |
| Existence and Uniqueness | p. 144 |
| The Role of Definitions in Creating Proofs | p. 153 |
| Proving and Expressing a Mathematical Equivalence | p. 160 |
| Indirect Methods of Proof | p. 168 |
| Proofs Involving Or. | p. 173 |
| A Mathematical Research Situation | p. 177 |
| Problems | p. 183 |
| Relations and Functions | p. 199 |
| Relations | p. 199 |
| Equivalence Relations and Partitions | p. 207 |
| Functions | p. 217 |
| One-to-One Functions, Onto Functions, and Bijections | p. 225 |
| Inverse Relations and Inverse Functions | p. 235 |
| Problems | p. 239 |
| The Natural Numbers, Induction, and Counting | p. 255 |
| Axioms for the Natural Numbers | p. 255 |
| Proof by Induction | p. 258 |
| Recursive Definition and Strong Induction | p. 270 |
| Elementary Number Theory | p. 276 |
| Some Elementary Counting Methods | p. 286 |
| Problems | p. 298 |
| Further Mathematical Explorations | p. 311 |
| Exploring Graph Theory | p. 311 |
| Exploring Groups | p. 323 |
| Exploring Set Cardinality | p. 337 |
| Index | p. 347 |
| Table of Contents provided by Ingram. All Rights Reserved. |