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East Side, West Side
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Lecture notes by Herbert S. Wilf on generating combinatorial objects and Maple.
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The Combinatorics Net
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Maintained by Bill Chen.
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ArXiv Front: CO Combinatorics
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Combinatorics section of the Front for the Mathematics ArXiv.
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Enumeration of the Binary Trees
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A note on Catalan numbers by Ivan Galkin.
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The Combinatorial Object Server
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Select a type together with specific parameter values and COS will return a list of all such combinatorial objects.
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Topics in Mathematics - Combinatorics
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In the Mathematics Archive at UTK.
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Extremal Combinatorics
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With Applications in Computer Science by Stasys Jukna.
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Encyclopedia of Combinatorial Structures
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Searchable database of structures with specifications and counts.
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Algebraic Combinatorics via Finite Group Actions
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A hypertext by A. Betten, H. Fripertinger and A. Kerber.
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CATS: Combinatorial Algorithms Test Sets
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Searchable index of problems, links and methodology maintained by the Association for Computing Machinery.
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A Survey of Venn Diagrams
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Various facts and figures about Venn diagrams by Frank Ruskey.
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G-Systems
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Theory of chord structures to create music through algorithms by Vladimir Ladma.
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Combinatorics
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Subfields in the AMS MSC 2000 classification 05.
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Combinatorial Data
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Brendan McKay's collection of miscellaneous tables in graph6 or sparse6 format.
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Catalogue of Lattices
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A catalogue of different types with applications to packing spheres by Neil Sloane and Gabriele Nebe.
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The Math Forum Math Library - Combinatorics
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Comprehensive catalog of websites relating to Combinatorics.
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Generating Functions
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Introduction to generating functions with interactive java applets by Alexander Bogomolny.
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Operational Research Programming Trivia
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Computer code for research algorithms in operational research and combinatorial optimization.
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Combinatorial Catalogues
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Combinatorial objects such as graphs, designs and geometries collected by Gordon Royle.
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On-line Dictionary of Combinatorics
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An expanding web text by Joe Fields.
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Series Expansions
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Iwan Jensen counts polyominoes (aka lattice animals), paths, and various related quantities.
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Lectures in Combinatorics
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An introduction to partially ordered sets, Dilworth's theorem, lattices and combinatorial geometries.
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The Cutting Sticks Problem
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An unsolved combinatorial problem by Frans Faase.
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Combinatorics
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MathWorld article with basic definitions and links.
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Algebraic Combinatorics via Finite Group Actions
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HTML book by A. Betten, H. Fripertinger, and A. Kerber.
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A Catalogue of Lattices
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By Gabriele Nebe and Neil Sloane.
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CATS: Combinatorial Algorithms Test Sets
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Searchable index of problems, links and methodology.
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