Math 2.0

Combinatorics Concept

Exponential generating function

Summary

An exponential generating function encodes a sequence (an)(a_n) as the series ∑anxn/n!\sum a_n x^n / n!. It is the natural tool to count labelled structures, because products give binomial convolutions. The node exponential generating function gives the precise definition.

Where this leads

2 pages build on this one.

Further reading

  1. Web https://en.wikipedia.org/wiki/Generating_function, Exponential generating function (EGF)
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