منابع مشابه
A family of large set of size nine
We investigate the existence of some large sets of size nine. The large set $LS[9](2,5,29)$ is constructed and existence of the family $LS[9](2,5,27l+j)$ for $lgeq 1, 2leq j
متن کاملWorlds and Propositions Set Free
The authors provide an object-theoretic analysis of two paradoxes in the theory of possible worlds and propositions stemming from Russell and Kaplan. After laying out the paradoxes, the authors provide a brief overview of object theory and point out how syntactic restrictions that prevent object-theoretic versions of the classical paradoxes are justified philosophically. The authors then trace ...
متن کاملa family of large set of size nine
we investigate the existence of some large sets of size nine. the large set $ls[9](2,5,29)$ is constructed and existence of the family $ls[9](2,5,27l+j)$ for $lgeq 1, 2leq j
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The definition and study of pattern avoidance for set partitions, which is an analogue of pattern avoidance for permutations, begun with Klazar. Sagan continued his work by considering set partitions which avoids a single partition of three elements, and Goyt generalized these results by considering partitions which avoids any family of partitions of a 3-element set. In this paper we enumerate ...
متن کاملOn abab-free and abba-free Set Partitions
These are partitions of [l] = {1, 2, . . . , l} into n blocks such that no four term subsequence of [l] induces the mentioned pattern and each k consecutive numbers of [l] fall into different blocks. These structures are motivated by Davenport-Schinzel sequences. We summarize and extend known enumerative results for the pattern p = abab and give an explicit formula for the number p(abab, n, l, ...
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ژورنال
عنوان ژورنال: Colloquium Mathematicum
سال: 1992
ISSN: 0010-1354,1730-6302
DOI: 10.4064/cm-63-1-107-109