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Monotonic subsequences in permutations of n natural numbers

✍ Scribed by B. S. Stechkin


Publisher
SP MAIK Nauka/Interperiodica
Year
1973
Tongue
English
Weight
116 KB
Volume
13
Category
Article
ISSN
0001-4346

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πŸ“œ SIMILAR VOLUMES


The Number of Permutations with Exactlyr
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Proving a first nontrivial instance of a conjecture of Noonan and Zeilberger we Ε½ . show that the number S n of permutations of length n containing exactly r r subsequences of type 132 is a P-recursive function of n. We show that this remains true even if we impose some restrictions on the permutati

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It is proved that the number of permuations on {I, 2, ... , n} with exactly one increasing subsequence of length 3 is ~(ntn3) [0,0,1,6,27,110,429, ... (Sloane A3517)]. Given a permutaion a E Sn, an abc subsequence is a set of three elements, a(i), aU), a(k), with a(i) < aU) < a(k) and i < j < k. It

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## Abstract In this paper we introduce the notion of pseudo ‐ergodicity to generalize Pustyl'nikov's estimates of Weyl sums to Weyl sums over subsequence of the natural numbers.