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Lectures in Combinatorics - http://www.freewebs.com/desargues/combinatorics.htm
An introduction to partially ordered sets, Dilworth's theorem, lattices and combinatorial geometries. |
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Polya's Enumeration Theorem - http://www.mathreference.com/cmb-gf,pet.html
An article on generating functions and Polya's theory of counting by Karl Dahlke. |
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Counting Young Tableaux - http://bergeron.math.uqam.ca/Bessel/bessel.html
An article on counting Young tableaux of bounded height by François Bergeron and Francis Gascon. |
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Catalogue of Lattices - http://www.research.att.com/~njas/lattices/
A catalogue of different types with applications to packing spheres by Neil Sloane and Gabriele Nebe. |
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Extremal Combinatorics - http://www.thi.informatik.uni-frankfurt.de/~jukna/EC_Book/
With Applications in Computer Science by Stasys Jukna. |