11 citations · 57 across the 33 of their papers we have counts for
Showing 2017 · math.COShow all
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math.CO2017
Counting partitions of a fixed genus
Robert Cori, Gábor Hetyei
We show that, for any fixed genus , the ordinary generating function for the genus partitions of an -element set into blocks is algebraic. The proof involves showing…
math.CO2017
Alternation acyclic tournaments
Gábor Hetyei
We define a tournament to be alternation acyclic if it does not contain a cycle in which descents and ascents alternate. Using a result by Athanasiadis on hyperplane arrangements,…