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- W1493114266 abstract "Enumeration of pattern-avoiding objects is an active area of study with connec- tions to such disparate regions of mathematics as Schubert varieties and stack-sortable sequences. Recent research in this area has brought attention to colored permutations and colored set partitions. A colored partition of a set S is a partition of S with each element receiving a color from the set (k) = {1,2,...,k}. Letn ≀ Ck be the set of partitions of (n) with colors from (k). In an earlier work, the authors studied pattern avoidance in colored set partitions in the equality sense. Here we study pattern avoidance in colored partitions in the pattern sense. We say that � ∈ �n ≀ Ck contains � ∈ �m ≀ Cl in the pattern sense if � contains a copywhen the colors are ignored and the colors on this copy ofare order isomorphic to the colors on �. Otherwise we say thatavoids �. We focus on patterns from �2 ≀C2 and find that many familiar and some new inte- ger sequences appear. We provide bijective proofs wherever possible, and we provide formulas for computing those sequences that are new." @default.
- W1493114266 created "2016-06-24" @default.
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- W1493114266 date "2012-03-01" @default.
- W1493114266 modified "2023-09-26" @default.
- W1493114266 title "Avoiding Colored Partitions of Two Elements in the Pattern Sense" @default.
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