Mertens function
XY or Xy may refer to:
- Xy (digraph), a digraph of the Romanized Popular Alphabet, used to write Hmong
- XY (magazine), a gay male youth magazine that also operated a personals website
- XY sex-determination system, a system in biology
- XY model, a model in physics
- coordinates, a system used to locate a point in two dimensions according to the cartesian coordinate system
- Xy, a member of the band Samael
- Aktenzeichen XY … ungelöst
See also
- X&Y, an album by Coldplay
- Pokémon X and Y, handheld video games for the Nintendo 3DS
- YX (disambiguation)
- Xyz (disambiguation)