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Clique Decompositions of Strong Short Ladders

E. J. Farrell1, M.A. Sam Chee1
1 Department of Mathematics The University of the West Indies St Augustine, Trinidad

Abstract

An explicit recurrence is obtained for the clique polynomial of a short ladder in which the two diagonals are drawn in each cell. From this result, an explicit formula for the number of decompositions of the ladder into triangles and \(4\)-cliques is obtained. The recurrence is then used to obtain results for the matching polynomial of the ladder. Finally, an association is made with a particular tiling problem.