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Several generalizations and variations of Chu-Vandermonde identity (1807.10604v1)

Published 23 Jul 2018 in math.CO and math.NT

Abstract: In this paper we prove some combinatorial identities which can be considered as generalizations and variations of remarkable Chu-Vandermonde identity. These identities are proved by using an elementary combinatorial-probabilistic approach to the expressions for the $k$-th moments ($k=1,2,3$) of some particular cases of recently investigated discrete random variables. Using one of these Chu-Vandermonde-type identities, two combinatorial congruences are established.

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