Includes proof of van der Waerden's 1926 conjecture on permanents, Wilson's theorem on asymptotic existence, and other developments in combinatorics since 1967. Also covers coding theory and its important connection with designs, problems of enumeration, and partition. Presents fundamentals in addition to latest advances, with illustrative problems at the end of each chapter. Enlarged appendixes include a longer list of block designs.
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PERMUTATIONS AND COMBINATIONS
GENERATING FUNCTIONS AND RECURSIONS
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antichain arcs automorphism base blocks biplane block design Bruck-Ryser-Chowla theorem choice classes coefficients complete cycles condition construct convex cone copositive corresponding define deletion difference set doubly stochastic entries equation equivalent exactly once exists finite field fixed GF(p GF(pr GF(q given gives graph group G H matrix Hadamard matrix Hence hyperplane incidence matrix integers intersection l(mod Latin squares Lemma linear matrix of order modulo multiplication nonnegative nonzero objects orbit parameters partially ordered set partitions per(X permutation permutation matrix plane of order points polynomial prime power primitive root problem projective plane Proof proved quadratic form quadratic residues rational recursive relation residues modulo row and column satisfying Solution unknown Steiner triple system subsets suppose symmetric design unique values vector whence word of weight write yields zero