unimodal sequence

unimodal sequence

[‚yü·nə‚mōd·əl ′sē·kwəns]
(mathematics)
A finite sequence of n real numbers, a1, a2, …, an , for which there is a positive integer, j, greater than 1 and less than n, such that ai is greater than ai-1for i greater than 1 and less than j, aj is greater than or equal to aj-1, and ai is less than ai-1for i greater than j and equal to or less than n.
References in periodicals archive ?
We say that X is parallel unimodal if the fundamental sequence of X is a unimodal sequence; we also say that X is parallel symmetric if the fundamental sequence of X is a symmetric sequence.
Brenti, Log-concave and unimodal sequences in algebra, combinatorics, and geometry: an update, in Contemp.
Stanley, Log-concave and unimodal sequences in algebra, combinatorics, and geometry, in Ann.