This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)
Mathematica Character Name


  • Unicode: 03A5.
  • Aliases: Esc U Esc, Esc Upsilon Esc.
  • Greek letter.
  • Not commonly used.
  • Used in physics for particles, and in the quantum theory of measurement.