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- W2804479209 abstract "In this paper, we consider statistics on compositions and set partitions represented geometrically as bargraphs. By a water cell, we mean a unit square exterior to a bargraph that lies along a horizontal line between any two squares contained within the area subtended by the bargraph. That is, if a large amount of a liquid were poured onto the bargraph from above and allowed to drain freely, then the water cells are precisely those cells where the liquid would collect. In this paper, we count both compositions and set partitions according to the number of descents and water cells in their bargraph representations and determine generating function formulas for the joint distributions on the respective structures. Comparable generating functions that count non-crossing and non-nesting partitions are also found. Finally, we determine explicit formulas for the sign balance and for the first moment of the water cell statistic on set partitions, providing both algebraic and combinatorial proofs." @default.
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- W2804479209 date "2018-01-01" @default.
- W2804479209 modified "2023-09-25" @default.
- W2804479209 title "Counting water cells in bargraphs of compositions and set partitions" @default.
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- W2804479209 doi "https://doi.org/10.2298/aadm170428010m" @default.
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