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Some Double Sums Involving Ratios of Binomial Coefficients Arising From Urn Models
In this paper we discuss a class of double sums involving ratios of binomial
coefficients. The sums are of the form where are
functions of . Such sums appear in the analyses of the Mabinogion urn and
the Ehrenfest urn in probability. Using hypergeometric functions, we are able
to simplify these sums, and in some cases express them in terms of the harmonic
numbers