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Abstract: A latin bitrade $T^{\diamond}, T^{\otimes}$ is a pair of partial latinsquares which defines the difference between two arbitrary latin squares$L^{\diamond} \supseteq T^{\diamond}$ and $L^{\diamond} \supseteq T^{\otimes}$of the same order. A 3-homogeneous bitrade $T^{\diamond}, T^{\otimes}$ hasthree entries in each row, three entries in each column, and each symbolappears three times in $T^{\diamond}$. Cavenagh 2006 showed that any3-homogeneous bitrade may be partitioned into three transversals. In this paperwe provide an independent proof of Cavenagh-s result using geometric methods.In doing so we provide a framework for studying bitrades as tessellations ofspherical, euclidean or hyperbolic space.



Autor: Carlo Hamalainen

Fuente: https://arxiv.org/







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