Simple permutations of the classes Av(321, 13524) and Av(321, 13452) have polynomial growth

被引:0
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作者
Karim, Lutful [1 ]
Khan, Nargis [2 ]
机构
[1] Univ Guelph, Dept Comp & Informat Sci, Guelph, ON, Canada
[2] Ryerson Univ, Dept Comp Sci, Toronto, ON, Canada
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中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
A permutation is called simple if its only blocks i.e. subsets of the permutation consist of singleton and the permutation itself. For example, 2134 is not a simple permutation since it consists of a block 213 but 3142 is a simple permutation. The basis of a permutation is a pattern which is minimal under involvement and do not belong to the permutation. In this paper, we prove that the number of simple permutations a of the pattern class with two basis of length 3 and 5 such as Av(321, 13452) and Av(321, 13524) have polynomial growth.
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页码:12 / 20
页数:9
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