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Showing 2019 · math.COShow all
2 papers · 2 filters
math.CO2019
Hecke insertion and maximal increasing and decreasing sequences in fillings of stack polyominoes
Ting Guo, Svetlana Poznanović
We prove that the number of 01-fillings of a given stack polyomino (a polyomino with justified rows whose lengths form a unimodal sequence) with at most one 1 per column which do n…
math.CO2019
Counting locally flat-foldable origami configurations via 3-coloring graphs
Alvin Chiu, William Hoganson, Thomas C. Hull +1
Origami, where two-dimensional sheets are folded into complex structures, is proving to be rich with combinatorial and geometric structure, most of which remains to be fully unders…