A Course in Combinatorics

by
Edition: 2nd
Format: Hardcover
Pub. Date: 2001-12-03
Publisher(s): Cambridge University Press
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Summary

This is the second edition of a popular book on combinatorics, a subject dealing with ways of arranging and distributing objects, and which involves ideas from geometry, algebra and analysis. The breadth of the theory is matched by that of its applications, which include topics as diverse as codes, circuit design and algorithm complexity. It has thus become essential for workers in many scientific fields to have some familiarity with the subject. The authors have tried to be as comprehensive as possible, dealing in a unified manner with, for example, graph theory, extremal problems, designs, colorings and codes. The depth and breadth of the coverage make the book a unique guide to the whole of the subject. The book is ideal for courses on combinatorical mathematics at the advanced undergraduate or beginning graduate level. Working mathematicians and scientists will also find it a valuable introduction and reference.

Table of Contents

Preface to the first edition xi
Preface to the second edition xiii
Graphs
1(11)
Terminology of graphs and digraphs, Eulerian circuits, Hamiltonian circuits
Trees
12(12)
Cayley's theorem, spanning trees and the greedy algorithm, search trees, strong connectivity
Colorings of graphs and Ramsey's theorem
24(13)
Brooks' theorem, Ramsey's theorem and Ramsey numbers, the Lovasz sieve, the Erdos-Szekeres theorem
Turan's theorem and extremal graphs
37(6)
Turan's theorem and extremal graph theory
Systems of distinct representatives
43(10)
Bipartite graphs, P. Hall's condition, SDRs, Konig's theorem, Birkhoff's theorem
Dilworth's theorem and extremal set theory
53(8)
Partially ordered sets, Dilworth's theorem, Sperner's theorem, symmetric chains, the Erdos-Ko-Rado theorem
Flows in networks
61(10)
The Ford-Fulkerson theorem, the integrality theorem, a generalization of Birkhoff's theorem, circulations
De Bruijn sequences
71(6)
The number of De Bruijn sequences
Two (0, 1, *) problems: addressing for graphs and a hash-coding scheme
77(12)
Quadratic forms, Winkler's theorem, associative block designs
The principle of inclusion and exclusion; inversion formulae
89(9)
Inclusion---exclusion, derangements, Euler indicator, Mobius function, Mobius inversion, Burnside's lemma, probleme des menages
Permanents
98(12)
Bounds on permanents, Schrijver's proof of the Minc conjecture, Fekete's lemma, permanents of doubly stochastic matrices
The Van der Waerden conjecture
110(9)
The early results of Marcus and Newman, London's theorem, Egoritsjev's proof
Elementary counting; Stirling numbers
119(10)
Stirling numbers of the first and second kind, Bell numbers, generating functions
Recursions and generating functions
129(23)
Elementary recurrences, Catalan numbers, counting of trees, Joyal theory, Lagrange inversion
Partitions
152(17)
The function pk(n), the partition function, Ferrers diagrams, Euler's identity, asymptotics, the Jacobi triple product identity, Young tableaux and the hook formula
(0, 1)-Matrices
169(13)
Matrices with given line sums, counting (0,1)-matrices
Latin squares
182(17)
Orthogonal arrays, conjugates and isomorphism, partial and incomplete Latin squares, counting Latin squares, the Evans conjecture, the Dinitz conjecture
Hadamard matrices, Reed---Muller codes
199(16)
Hadamard matrices and conference matrices, recursive constructions, Paley matrices, Williamson's method, excess of a Hadamard matrix, first order Reed-Muller codes
Designs
215(29)
The Erdos-De Bruijn theorem, Steiner systems, balanced incomplete block designs, Hadamard designs, counting, (higher) incidence matrices, the Wilson-Petrenjuk theorem, symmetric designs, projective planes, derived and residual designs, the Bruck-Ryser-Chowla theorem, constructions of Steiner triple systems, write-once memories
Codes and designs
244(17)
Terminology of coding theory, the Hamming bound, the Singleton bound, weight enumerators and Mac Williams' theorem, the Assmus-Mattson theorem, symmetry codes, the Golay codes, codes from projective planes
Strongly regular graphs and partial geometries
261(22)
The Bose-Mesner algebra, eigenvalues, the integrality condition, quasisymmetric designs, the Krein condition, the absolute bound, uniqueness theorems, partial geometries, examples, directed strongly regular graphs, neighborhood regular graphs
Orthogonal Latin squares
283(20)
Pairwise orthogonal Latin squares and nets, Euler's conjecture, the Bose-Parker-Shrikhande theorem, asymptotic existence, orthogonal arrays and transversal designs, difference methods, orthogonal subsquares
Projective and combinatorial geometries
303(22)
Projective and affine geometries, duality, Pasch's axiom, Desargues' theorem, combinatorial geometries, geometric lattices, Greene's theorem
Gaussian numbers and q-analogues
325(8)
Chains in the lattice of subspaces, q-analogue of Sperner's theorem, interpretation of the coefficients of the Gaussian polynomials, spreads
Lattices and Mobius inversion
333(18)
The incidence algebra of a poset, the Mobius function, chromatic polynomial of a graph, Weisner's theorem, complementing permutations of geometric lattices, connected labeled graphs, MDS codes
Combinatorial designs and projective geometries
351(18)
Arcs and subplanes in projective planes, blocking sets, quadratic and Hermitian forms, unitals, generalized quadrangles, Mobius planes
Difference sets and automorphisms
369(14)
Block's lemma, automorphisms of symmetric designs, Paley-Todd and Stanton-Sprott difference sets, Singer's theorem
Difference sets and the group ring
383(13)
The Multiplier Theorem and extensions, homomorphisms and further necessary conditions
Codes and symmetric designs
396(9)
The sequence of codes of a symmetric design, Wilbrink's theorem
Association schemes
405(27)
Examples, the eigenmatrices and orthogonality relations, formal duality, the distribution vector of a subset, Delsarte's inequalities, polynomial schemes, perfect codes and tight designs
(More) algebraic techniques in graph theory
432(19)
Tournaments and the Graham-Pollak theorem, the spectrum of a graph, Hoffman's theorem, Shannon capacity, applications of interlacing and Perron-Frobenius
Graph connectivity
451(8)
Vertex connectivity, Menger's theorem, Tutte connectivity
Planarity and coloring
459(13)
The chromatic polynomial, Kuratowski's theorem, Euler's formula, the Five Color Theorem, list-colorings
Whitney Duality
472(19)
Whitney duality, circuits and cutsets, MacLane's theorem
Embeddings of graphs on surfaces
491(16)
Embeddings on arbitrary surfaces, the Ringel-Youngs theorem, the Heawood conjecture, the Edmonds embedding technique
Electrical networks and squared squares
507(15)
The matrix-tree theorem, De Bruijn sequences, the network of a squared rectangle, Kirchhoff's theorem
Polya theory of counting
522(14)
The cycle index of a permutation group, counting orbits, weights, necklaces, the symmetric group, Stirling numbers
Baranyai's theorem
536(6)
One-factorizations of complete graphs and complete designs
Appendix 1. Hints and comments on problems
542(36)
Hints, suggestions, and comments on the problems in each chapter
Appendix 2. Formal power series
578(6)
Formal power series ring, formal derivatives, inverse functions, residues, the Lagrange-Burmann formula
Name Index 584(6)
Subject Index 590

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