# Upsilon

In mathematics, the uppercase ${\displaystyle \Upsilon }$ is used to represent the upsilon function (a variant of Riemann zeta function), while the lowercase ${\displaystyle \upsilon }$ is used as a general variable.[1] In physics, the uppercase ${\displaystyle \Upsilon }$ is used to represent an upsilon meson. In astrology, the same letter is used for the sign of Aries.[2]