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How to Count

An Introduction to Combinatorics

Hardcover

Published: 2nd September 2010
RRP $97.99
$88.95
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Emphasizes a Problem Solving Approach
A first course in combinatorics

Completely revised, How to Count: An Introduction to Combinatorics, Second Edition shows how to solve numerous classic and other interesting combinatorial problems. The authors take an easily accessible approach that introduces problems before leading into the theory involved. Although the authors present most of the topics through concrete problems, they also emphasize the importance of proofs in mathematics.

New to the Second Edition
This second edition incorporates 50 percent more material. It includes seven new chapters that cover occupancy problems, Stirling and Catalan numbers, graph theory, trees, Dirichlet's pigeonhole principle, Ramsey theory, and rook polynomials. This edition also contains more than 450 exercises.

Ideal for both classroom teaching and self-study, this text requires only a modest amount of mathematical background. In an engaging way, it covers many combinatorial tools, such as the inclusion-exclusion principle, generating functions, recurrence relations, and Pólya's counting theorem.

The current edition is about 60% longer and represents an extensively updated collaboration coauthored with R.B.J.T. Allenby. Both authors have decades of experience teaching related material at the University of Leeds. ... The book is beautifully structured to facilitate both instruction in a classroom as well as self-instruction. ... Every section of the book has a number of [paired] exercises which are designed to solidify and build understanding of the topics in the section. ... This is exactly the kind of exercise regimen serious readers, instructors, and students need and are so rarely provided. ... Another pedagogical asset of the text is the extensive incorporation of historical anecdotes about the discoverers of the results. ... it fosters an admiration of the developers of the field, an attitude which is key to transforming students of mathematics into professional mathematicians. ... The authors have created an interesting, instructive, and remarkably usable text. The book clearly benefits instructors who need a solid, readable text for a course on discrete mathematics and counting. In fact, for any professional who wants an understandable text from which they can acquire a broad and mathematically solid view of many of the classic problems and results in counting theory, including their origin, proof, and application to other problems in combinatorics, this book is recommended. -James A. McHugh, SIAM Review, 54 (1), 2012 ... thoughtfully written, contain[s] plenty of material and exercises ... very readable and useful ... -MAA Reviews, February 2011 The reasons I adopted this book are simple: it's the best one-volume book on combinatorics for undergraduates. It begins slowly and gently, but does not avoid subtleties or difficulties. It includes the right mixture of topics without bloat, and always with an eye to good mathematical taste and coherence. Enumerative combinatorics is developed rather fully, through Stirling and Catalan numbers, for example, before generating functions are introduced. Thus this tool is very much appreciated and its 'naturalness' is easier to comprehend. Likewise, partitions are introduced in the absence of generating functions, and then later generating functions are applied to them: again, a wise pedagogical move. The ordering of chapters is nicely set up for two different single-semester courses: one that uses more algebra, culminating in Polya's counting theorem; the other concentrating on graph theory, ending with a variety of Ramsey theory topics. ... I was very much impressed with the first edition when I encountered it in 1994. I like the second edition even more. ... -Paul Zeitz, University of San Francisco, California, USA Completely revised, the book shows how to solve numerous classic and other interesting combinatorial problems. ... The reading list at the end of the book gives direction to exploring more complicated counting problems as well as other areas of combinatorics. -Zentralblatt MATH 1197

Preface to the Second Editionp. xi
Acknowledgmentsp. xiii
Authorsp. xv
What's it All About?p. 1
What is Combinatorics?p. 1
Classic Problemsp. 2
What You Need to Knowp. 14
Are you Sitting Comfortably?p. 15
Permutations and Combinationsp. 17
The Combinatorial Approachp. 17
Permutationsp. 17
Combinationsp. 21
Applications to Probability Problemsp. 28
The Multinomial Theoremp. 34
Permutations and Cyclesp. 36
Occupancy Problemsp. 39
Counting the Solutions of Equationsp. 39
New Problems from Oldp. 43
A "Reduction" Theorem for the Stirling Numbersp. 47
The Inclusion-Exclusion Principlep. 51
Double Countingp. 51
Derangementsp. 58
A Formula for the Stirling Numbersp. 60
Stirling and Catalan Numbersp. 63
Stirling Numbersp. 63
Permutations and Stirling Numbersp. 68
Catalan Numbersp. 71
Partitions and Dot Diagramsp. 81
Partitionsp. 81
Dot Diagramsp. 83
A Bit of Speculationp. 89
More Proofs Using Dot Diagramsp. 92
Generating Functions and Recurrence Relationsp. 95
Functions and Power Seriesp. 95
Generating Functionsp. 98
What is a Recurrence Relation?p. 101
Fibonacci Numbersp. 103
Solving Homogeneous Linear Recurrence Relationsp. 109
Nonhomogeneous Linear Recurrence Relationsp. 114
The Theory of Linear Recurrence Relationsp. 120
Some Nonlinear Recurrence Relationsp. 124
Partitions and Generating Functionsp. 127
The Generating Function for the Partition Numbersp. 127
A Quick(ish) Way of Finding p(n)p. 132
An Upper Bound for the Partition Numbersp. 142
The Hardy-Ramanujan Formulap. 145
The Story of Hardy and Ramanujanp. 147
Introduction to Graphsp. 151
Graphs and Picturesp. 151
Graphs: A Picture-Free Definitionp. 152
Isomorphism of Graphsp. 154
Paths and Connected Graphsp. 163
Planar Graphsp. 168
Eulerian Graphsp. 178
Hamiltonian Graphsp. 182
The Four-Color Theoremp. 188
Treesp. 199
What is a Tree?p. 199
Labeled Treesp. 204
Spanning Trees and Minimal Connectorsp. 210
The Shortest-Path Problemp. 217
Groups of Permutationsp. 223
Permutations as Groupsp. 223
Symmetry Groupsp. 229
Subgroups and Lagrange's Theoremp. 235
Orders of Group Elementsp. 240
The Orders of Permutationsp. 242
Group Actionsp. 245
Coloringsp. 245
The Axioms for Group Actionsp. 247
Orbitsp. 249
Stabilizersp. 250
Counting Patternsp. 257
Frobenius's Counting Theoremp. 257
Applications of Frobenius's Counting Theoremp. 259
Pólya Countingp. 267
Colorings and Group Actionsp. 267
Pattern Inventoriesp. 270
The Cycle Index of a Groupp. 274
Pólya's Counting Theorem: Statement and Examplesp. 277
Pólya's Counting Theorem: The Proofp. 281
Counting Simple Graphsp. 285
Dirichlet's Pigeonhole Principlep. 293
The Origin of the Principlep. 293
The Pigeonhole Principlep. 294
More Applications of the Pigeonhole Principlep. 297
Ramsey Theoryp. 303
What is Ramsey's Theorem?p. 303
Three Lovely Theoremsp. 310
Graphs of Many Colorsp. 314
Euclidean Ramsey Theoryp. 315
Rook Polynomials and Matchingsp. 319
How Rook Polynomials are Definedp. 319
Matchings and Marriagesp. 332
Solutions to the A Exercisesp. 339
Books for Further Readingp. 419
Index for Notationp. 421
Indexp. 423
Table of Contents provided by Ingram. All Rights Reserved.

ISBN: 9781420082609
ISBN-10: 1420082604
Series: Discrete Mathematics and Its Applications
Audience: Tertiary; University or College
Format: Hardcover
Language: English
Number Of Pages: 444
Published: 2nd September 2010
Dimensions (cm): 25.4 x 17.8  x 2.5
Weight (kg): 0.93