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Parity Types, Cycle Structures and Autotopisms of Latin Squares

Research paper by Daniel Kotlar

Indexed on: 03 Oct '12Published on: 03 Oct '12Published in: Mathematics - Combinatorics



Abstract

The parity type of a Latin square is defined in terms of the numbers of even and odd rows and columns. It is related to an Alon-Tarsi-like conjecture that applies to Latin squares of odd order. Parity types are used to derive upper bounds for the size of autotopy groups. A fast algorithm for finding the autotopy group of a Latin square, based on the cycle decomposition of its rows, is presented.