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Algebraic Combinatorics via Finite Group Actions
HTML book by A. Betten, H. Fripertinger, and A. Kerber.
http://www.mathe2.uni-bayreuth.de/frib/htm...
The Math Forum Math Library - Combinatorics
Comprehensive catalog of websites relating to Combinatorics.
http://mathforum.org/library/topics/combin...
Combinatorial Catalogues
Combinatorial objects such as graphs, designs and geometries collected by Gordon Royle.
http://www.csse.uwa.edu.au/~gordon/data.ht...
G-Systems
Theory of chord structures to create music through algorithms by Vladimir Ladma.
http://www.sweb.cz/vladimir_ladma/english/...
Combinatorics
MathWorld article with basic definitions and links.
http://mathworld.wolfram.com/Combinatorics...
Operational Research Programming Trivia
Computer code for research algorithms in operational research and combinatorial optimization.
http://www.ortrivia.com/
A Survey of Venn Diagrams
Various facts and figures about Venn diagrams by Frank Ruskey.
http://www.combinatorics.org/Surveys/ds5/V...
Extremal Combinatorics
With Applications in Computer Science by Stasys Jukna.
http://www.thi.informatik.uni-frankfurt.de...
The Cutting Sticks Problem
An unsolved combinatorial problem by Frans Faase.
http://www.iwriteiam.nl/cutsticks.html
Combinatorial Data
Brendan McKay's collection of miscellaneous tables in graph6 or sparse6 format.
http://cs.anu.edu.au/~bdm/data/
Series Expansions
Iwan Jensen counts polyominoes (aka lattice animals), paths, and various related quantities.
http://www.ms.unimelb.edu.au/~iwan/Series....
The Combinatorics Net
Maintained by Bill Chen.
http://www.combinatorics.net/
A Catalogue of Lattices
By Gabriele Nebe and Neil Sloane.
http://www.research.att.com/~njas/lattices...
Encyclopedia of Combinatorial Structures
Searchable database of structures with specifications and counts.
http://algo.inria.fr/encyclopedia/
The Combinatorial Object Server
Select a type together with specific parameter values and COS will return a list of all such combinatorial objects.
http://www.theory.csc.uvic.ca/~cos/
Lectures in Combinatorics
An introduction to partially ordered sets, Dilworth's theorem, lattices and combinatorial geometries.
http://www.freewebs.com/desargues/combinat...
Topics in Mathematics - Combinatorics
In the Mathematics Archive at UTK.
http://archives.math.utk.edu/topics/combin...
Combinatorics
Subfields in the AMS MSC 2000 classification 05.
http://www.ams.org/msc/05-xx.html
ArXiv Front: CO Combinatorics
Combinatorics section of the Front for the Mathematics ArXiv.
http://front.math.ucdavis.edu/math.CO
Generating Functions
Introduction to generating functions with interactive java applets by Alexander Bogomolny.
http://www.cut-the-knot.org/blue/Generatin...
Enumeration of the Binary Trees
A note on Catalan numbers by Ivan Galkin.
http://ulcar.uml.edu/~iag/CS/Catalan.html
CATS: Combinatorial Algorithms Test Sets
Searchable index of problems, links and methodology.
http://www.jea.acm.org/CATS/
East Side, West Side
Lecture notes by Herbert S. Wilf on generating combinatorial objects and Maple.
http://www.cis.upenn.edu/~wilf/lecnotes.ht...
On-line Dictionary of Combinatorics
An expanding web text by Joe Fields.
http://www.southernct.edu/~fields/comb_dic...
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