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By Ashay Dharwadker. Includes profile, research papers for other algorithms, lecture notes, and student database.
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Various facts and figures about Venn diagrams by Frank Ruskey.
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A hypertext by A. Betten, H. Fripertinger and A. Kerber.
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Combinatorics section of the Front for the Mathematics ArXiv.
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Searchable index of problems, links and methodology maintained by the Association for Computing Machinery.
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A catalogue of different types with applications to packing spheres by Neil Sloane and Gabriele Nebe.
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Combinatorial objects such as graphs, designs and geometries collected by Gordon Royle.
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Brendan McKay's collection of miscellaneous tables in graph6 or sparse6 format.
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MathWorld article with basic definitions and links.
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An article on counting Young tableaux of bounded height by François Bergeron and Francis Gascon.
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Searchable database of structures with specifications and counts.
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Enumeration of polyhedra with upto 9 faces by Steven Dutch.
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A note on Catalan numbers by Ivan Galkin.
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With Applications in Computer Science by Stasys Jukna.
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Theory of chord structures to create music through algorithms by Vladimir Ladma.
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Introduction to generating functions with interactive java applets by Alexander Bogomolny.
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An introduction to partially ordered sets, Dilworth's theorem, lattices and combinatorial geometries.
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An expanding web text by Joe Fields.
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An article on generating functions and Polya's theory of counting by Karl Dahlke.
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Iwan Jensen counts polyominoes (aka lattice animals), paths, and various related quantities.
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Tilings of squares and rectangles, the classical problem and variations.
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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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Maintained by Bill Chen.
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An unsolved combinatorial problem by Frans Faase.
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Comprehensive catalog of websites relating to Combinatorics.
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Examples in traditional Japanese patterns.
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In the Mathematics Archive at University of Tennessee, Knoxville.