Symbolic method (combinatorics): Difference between revisions

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With labelled structures, an [[exponential generating function]] (EGF) is used. The EGF of a sequence <math>A_{n}</math> is defined as
 
:<math>A(x)=\sum_{n=0}^{\infty}A_{n}\frac{x^{n}}{n!}.</math>
 
===Product===