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arXiv 2005.08214math.CO
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两行三列填充的部分拉丁方的补齐

Completing partial Latin squares with two filled rows and three filled columns

Carl Johan Casselgren, Herman Göransson

摘要:

考虑一个部分拉丁方$P$,其中前两行和前三列完全填充,并且$P$的每隔一个单元格为空。它已被证明,所有这样的部分拉丁方的顺序至少$8$是可完成的。基于技术的库尔和麦金,我们描述了一个框架,完成部分拉丁方在这个类。此外,我们使用我们的方法证明,所有部分拉丁方从这个家庭,其中的非空的行和列的交点形成一个拉丁矩形与三个不同的符号,是可完成的。

英文摘要:

Consider a partial Latin square $P$ where the first two rows and first three columns are completely filled, and every other cell of $P$ is empty. It has been conjectured that all such partial Latin squares of order at least $8$ are completable. Based on a technique by Kuhl and McGinn we describe a framework for completing partial Latin squares in this class. Moreover, we use our method for proving that all partial Latin squares from this family, where the intersection of the nonempty rows and columns form a Latin rectangle with three distinct symbols, is completable.

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