In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+03A5 (GREEK CAPITAL LETTER UPSILON).
\UpsilonSymbol
The Υ symbol (Greek capital letter upsilon, U+03A5), written as \Upsilon in LaTeX math mode.
The Υ symbol (Greek capital letter upsilon, U+03A5), written as \Upsilon in LaTeX math mode.
TeXForm parses this entry as a character leaf mapped to U+03A5 (GREEK CAPITAL LETTER UPSILON).