U

Unimodality

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

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

An On-line Dictionary of Combinatorics