European J. Combin., t. 33, p. 227-236, 2012.

Bodo Lass

The Algebra of Set Functions I : The Product Theorem and Duality

Abstract. We give a comprehensive introduction to the algebra of set functions and its generating functions. This algebraic tool allows us to formulate and prove a product theorem for the enumeration of functions of many different kinds, in particular injective functions, surjective functions, matchings and colourings of the vertices of a hypergraph. Moreover, we develop a general duality theory for counting functions.


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