Problem 2: Let pı .. .pn E Sn be a permutation, considered in its one-line notation....

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Problem 2: Let pı .. .pn E Sn be a permutation, considered in its one-line notation. A descent in p is an index 1 < i S n 1 s

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Solution- Giver fat. let P P E s be a permutaton, Congidered sone-ltre notatton うNow, 一fnd hao many pe mutatta yfoSn have ea So Fracy ome descent 7-T and it aus e eatt one degCent n-l

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Problem 2: Let pı .. .pn E Sn be a permutation, considered in its one-line notation....

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