Kevin Compton, {\sc Inria}--Rocquencourt and University of Michigan

Tauberian Theorems for Combinatorical Asymptotics

In classical analysis, an Abelian theorem is one that states that if the power series expansion of an analytic function behaves nicely at its radius of convergence, then function itself behaves nicely as it approaches the radius of convergence. To make the converse of an Abelian theorem true, one generally needs to add some condition to the hypothesis. A Tauberian theorem is a corrected converse to an Abelian theorem. We will survey different kinds of Tauberian theorems and their applications to obtaining asymptotics in combinatorial enumeration problems.