A
sequence of numbers which increases up to a largest value and then decreases (or
vice versa). I.e. if s1, s2, s3, ... sn is a
sequence, it is
unimodal if there is a t such that s1 ≤ s2 ≤ ... ≤ st, and st ≥ st+1 ≥ ... ≥
sn.
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