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arxiv: 0906.5196 · v1 · pith:I42FDM6Pnew · submitted 2009-06-29 · 🧮 math.CO

The distribution of longest run lengths in integer compositions

classification 🧮 math.CO
keywords compositionslengthsnumberpartsavoidblocksconstantcontiguous
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We find the generating function for $C(n,k,r)$, the number of compositions of $n$ into $k$ positive parts all of whose runs (contiguous blocks of constant parts) have lengths less than $r$, using recent generalizations of the method of Guibas and Odlyzko for finding the number of words that avoid a given list of subwords.

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