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What is Combinatorics

• A quote from Webster, provided by John Noonan
• A description at the Geometry Center
• A description by Werner Heise
• 05 - Combinatorics, from the Mathematical Atlas, by Dave Rusin
• On-line Dictionary of Combinatorics , by Joe Fields
• AMOF: The Amazing Mathematical Object Factory, maintained by Frank Ruskey and Scott Lausch
• Combinatorial figures , by Robert M. Dickau (Math Forum)
• Discrete Mathematics, what is it? , the Leibniz Laboratory

Topics in Combinatorics

• Algebriac Combinatorics
• Binomial Sums, Eric Weisstein's world of MTHEMATICS
• Matroid Theory, by Sandra Kingan.
• The Erdos Page
• Diamond Theory, by Steven H. Cullinane.
• Flocks of Cones, by Bill Cherowitzo.
• Hyperovals in Desarguesian Planes, by Bill Cherowitzo.
• Encyclopedia of Combinatorial Structures | Canadian Mirror
• Combinatorics, by Kevin Brown.
• Diagram geometry, by Antonio Pasini [ PS file | DVI file ]
• A Journey through Intersection Graph County by Erich Prisner
• The binomial coefficients
• Catalan numbers | The meanings of Catalan numbers | An illustration
• Algebraic Combinatorics Via Finite Group Actions, by A. Betten, H. Fripertinger, A. Kerber
• Manuscripts and Publications on Macdonald Polynomials and The n! Conjecture , by A. Garsia
• On-Line Encyclopedia of Integer Sequences, by Neil J. A. Sloane
• A Catalogue of Lattices, by Neil J. A. Sloane and Gabriele Nebe
• Signed, Gain, and Biased Graphs , by Thomas Zaslavsky
• Matroid Theory, compiled by Sandra Kingan
• Matroids and Signed Graphs, by Steven R. Pagano
• Graph Coloring Resources , by Joseph Culberson
• Graph Coloring Problems , by Jørgen Bang-Jensen and Bjarne Toft
• Hamiltonian cycle and path problems , by Gregory Gutin and Pablo Moscato
• The Four Color Theorem, by Robin Thomas
• What is the Umbral Calculus?, by A. Di Bucchianico
• A New Testament for Special Functions?, by Barry A. Cipra
• Szemerédi's regularity lemma and its applications in graph theory, [dvi file], by János Komlós and Miklós Simonovits
• Graphs, Theory-Algorithms-Complexity, compiled by Thomas Emden-Weinert
• Srinivasa Aiyangar Ramanujan, The MacTutor History of Mathematics archive.
• Percy Alexander MacMahon, The MacTutor History of Mathematics archive
• More mathematicians , listed by The MacTutor History of Mathematics archive
• Graph Theory Tutorials , by Chris K. Caldwell | Extended collection by Shereef Hany Bishay
• Graph Theory by Stephen C. Locke