See also:

• Computers: Algorithms  (328)
• Science: Math: Algebra: Group Theory  (31)
• Science: Math: Probability  (106)

This category in other languages:
	German  (2)   Russian  (12)

• Algebraic Combinatorics via Finite Group Actions - A hypertext by A. Betten, H. Fripertinger and A. Kerber.
• ArXiv Front: CO Combinatorics - Combinatorics section of the Front for the Mathematics ArXiv.
• Catalogue of Lattices - A catalogue of different types with applications to packing spheres by Neil Sloane and Gabriele Nebe.
• CATS: Combinatorial Algorithms Test Sets - Searchable index of problems, links and methodology maintained by the Association for Computing Machinery.
• Combinatorial Catalogues - Combinatorial objects such as graphs, designs and geometries collected by Gordon Royle.
• Combinatorial Data - Brendan McKay's collection of miscellaneous tables in graph6 or sparse6 format.
• The Combinatorial Object Server - Select a type together with specific parameter values and COS will return a list of all such combinatorial objects.
• Combinatorics - Subfields in the AMS MSC 2000 classification 05.
• Combinatorics - MathWorld article with basic definitions and links.
• The Combinatorics Net - Maintained by Bill Chen.
• Counting Young Tableaux - An article on counting Young tableaux of bounded height by François Bergeron and Francis Gascon.
• The Cutting Sticks Problem - An unsolved combinatorial problem by Frans Faase.
• Encyclopedia of Combinatorial Structures - Searchable database of structures with specifications and counts.
• Enumeration of Polyhedra - Enumeration of polyhedra with upto 9 faces by Steven Dutch.
• Enumeration of the Binary Trees - A note on Catalan numbers by Ivan Galkin.
• Extremal Combinatorics - With Applications in Computer Science by Stasys Jukna.
• Generating Functions - Introduction to generating functions with interactive java applets by Alexander Bogomolny.
• G-Systems - Theory of chord structures to create music through algorithms by Vladimir Ladma.
• Lectures in Combinatorics - An introduction to partially ordered sets, Dilworth's theorem, lattices and combinatorial geometries.
• The Math Forum Math Library - Combinatorics - Comprehensive catalog of websites relating to Combinatorics.
• A New Proof of the Four Colour Theorem - By Ashay Dharwadker. Includes profile, research papers for other algorithms, lecture notes, and student database.
• On-line Dictionary of Combinatorics - An expanding web text by Joe Fields.
• Polya's Enumeration Theorem - An article on generating functions and Polya's theory of counting by Karl Dahlke.
• Series Expansions - Iwan Jensen counts polyominoes (aka lattice animals), paths, and various related quantities.
• The Seventeen Wallpaper Groups - Examples in traditional Japanese patterns.
• Squared Squares - Tilings of squares and rectangles, the classical problem and variations.
• A Survey of Venn Diagrams - Various facts and figures about Venn diagrams by Frank Ruskey.
• Topics in Mathematics - Combinatorics - In the Mathematics Archive at University of Tennessee, Knoxville.