Mathematical Proofs – Chantrad, Polimeni, Zhang – 2nd Edition


Mathematical Proofs: A Transition to Advanced Mathematics, Second Edition, prepares for the more abstract mathematics courses that follow calculus. This text introduces students to proof techniques and writing proofs of their own.

As such, it is an introduction to the mathematics enterprise, providing solid introductions to relations, functions, and cardinalities of sets.

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Table of Contents

0. Communicating Mathematics
Learning Mathematics
What Others Have Said About Writing
Mathematical Writing
Using Symbols
Writing Mathematical Expressions
Common Words and Phrases in Mathematics
Some Closing Comments about Writing
1. Sets
1.1 Describing a Set
1.2 Subsets
1.3 Set Operations
1.4 Indexed Collections of Sets
1.5 Partitions of Sets
1.6 Cartesian Products of Sets
Exercises for Chapter 1
2. Logic
2.1 Statements
2.2 The Negation of a Statement
2.3 The Disjunction and Conjunction of Statements
2.4 The Implication
2.5 More on Implications
2.6 The Biconditional
2.7 Tautologies and Contradictions
2.8 Logical Equivalence
2.9 Some Fundamental Properties of Logical Equivalence
2.10 Quantified Statements
2.11 Characterizations of Statements
Exercises for Chapter 2
3. Direct Proof and Proof by Contrapositive
3.1 Trivial and Vacuous Proofs
3.2 Direct Proofs
3.3 Proof by Contrapositive
3.4 Proof by Cases
3.5 Proof Evaluations
Exercises for Chapter 3
4. More on Direct Proof and Proof by Contrapositive
4.1 Proofs Involving Divisibility of Integers
4.2 Proofs Involving Congruence of Integers
4.3 Proofs Involving Real Numbers
4.4 Proofs Involving Sets
4.5 Fundamental Properties of Set Operations
4.6 Proofs Involving Cartesian Products of Sets
Exercises for Chapter 4
5. Existence and Proof by Contradiction
5.1 Counterexamples
5.2 Proof by Contradiction
5.3 A Review of Three Proof Techniques
5.4 Existence Proofs
5.5 Disproving Existence Statements
Exercises for Chapter 5
6. Mathematical Induction
6.1 The Principle of Mathematical Induction
6.2 A More General Principle of Mathematical Induction
6.3 Proof by Minimum Counterexample
6.4 The Strong Principle of Mathematical Induction
Exercises for Chapter 6
7. Prove or Disprove
7.1 Conjectures in Mathematics
7.2 Revisiting Quantified Statements
7.3 Testing Statements
7.4 A Quiz of "Prove or Disprove" Problems
Exercises for Chapter 7
8. Equivalence Relations
8.1 Relations
8.2 Properties of Relations
8.3 Equivalence Relations
8.4 Properties of Equivalence Classes
8.5 Congruence Modulo n
8.6 The Integers Modulo n
Exercises for Chapter 8
9. Functions
9.1 The Definition of Function
9.2 The Set of All Functions from A to B
9.3 One-to-one and Onto Functions
9.4 Bijective Functions
9.5 Composition of Functions
9.6 Inverse Functions
9.7 Permutations
Exercises for Chapter 9
10. Cardinalities of Sets
10.1 Numerically Equivalent Sets
10.2 Denumerable Sets
10.3 Uncountable Sets
10.4 Comparing Cardinalities of Sets
10.5 The Schröder-Bernstein Theorem
Exercises for Chapter 10
11. Proofs in Number Theory
11.1 Divisibility Properties of Integers
11.2 The Division Algorithm
11.3 Greatest Common Divisors
11.4 The Euclidean Algorithm
11.5 Relatively Prime Integers
11.6 The Fundamental Theorem of Arithmetic
11.7 Concepts Involving Sums of Divisors
Exercises for Chapter 11
12. Proofs in Calculus
12.1 Limits of Sequences
12.2 Infinite Series
12.3 Limits of Functions
12.4 Fundamental Properties of Limits of Functions
12.5 Continuity
12.6 Differentiability
Exercises for Chapter 12
13. Proofs in Group Theory
13.1 Binary Operations
13.2 Groups
13.3 Permutation Groups
13.4 Fundamental Properties of Groups
13.5 Subgroups
13.6 Isomorphic Groups
Exercises for Chapter 13
Answers and Hints to Selected Odd-Numbered Exercises
Index of Symbols
Index of Mathematical Terms

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