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