On the existence of 3-way k-homogeneous Latin trades |
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Authors: | Behrooz Bagheri Gh. Diane Donovan E.S. Mahmoodian |
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Affiliation: | 1. Department of Mathematical Sciences, Isfahan University of Technology, 84156-83111, Isfahan, Islamic Republic of Iran;2. Department of Mathematical Sciences, Sharif University of Technology, P.O. Box 11155–9415, Tehran, Islamic Republic of Iran;3. Department of Mathematics, The University of Queensland, Brisbane 4072, Australia |
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Abstract: | A -way Latin trade of volume is a collection of partial Latin squares , containing exactly the same filled cells, such that, if cell is filled, it contains a different entry in each of the partial Latin squares, and such that row in each of the partial Latin squares contains, set-wise, the same symbols, and column likewise. It is called a -way-homogeneous Latin trade if, in each row and each column, , for , contains exactly elements, and each element appears in exactly times. It is also denoted as a Latin trade, where is the size of the partial Latin squares.We introduce some general constructions for -way -homogeneous Latin trades, and specifically show that, for all , , and , and for all , (except for four specific values), a -way -homogeneous Latin trade of volume exists. We also show that there is no Latin trade and there is no Latin trade. Finally, we present general results on the existence of -way -homogeneous Latin trades for some modulo classes of . |
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