Douglas West's Home Page Douglas B. West Professor, Mathematics Dept. Book titles link to contents in postscript or to further resources.
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Used at more than 60 U.S. schools and others abroad. Suitable for undergraduate or graduate use, with an extensive final chapter of advanced topics beyond the undergraduate course. A thorough introduction to combinatorics at the graduate level. Chapters are Enumeration, Graphs, Sets, Methods, Designs, Optimization . Assumes the mathematical maturity of graduate students but no prior combinatorics.