کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5776803 | 1413642 | 2017 | 19 صفحه PDF | دانلود رایگان |
An rÃs partial Latin rectangle (lij) is an rÃs matrix containing elements of {1,2,â¦,n}âª{â } such that each row and each column contain at most one copy of any symbol in {1,2,â¦,n}. An entry is a triple (i,j,lij) with lijâ â . Partial Latin rectangles are operated on by permuting the rows, columns, and symbols, and by uniformly permuting the coordinates of the set of entries. The stabilizers under these operations are called the autotopism group and the autoparatopism group, respectively.We develop the theory of symmetries of partial Latin rectangles, introducing the concept of a partial Latin rectangle graph. We give constructions of m-entry partial Latin rectangles with trivial autotopism groups for all possible autoparatopism groups (up to isomorphism) when: (a) r=s=n, i.e., partial Latin squares, (b) r=2 and s=n, and (c) r=2 and sâ n.
Journal: Discrete Mathematics - Volume 340, Issue 6, June 2017, Pages 1242-1260