In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+21D5 (UP DOWN DOUBLE ARROW).
\UpdownarrowSymbol
The ⇕ symbol (Up down double arrow, U+21D5), written as \Updownarrow in LaTeX math mode.
The ⇕ symbol (Up down double arrow, U+21D5), written as \Updownarrow in LaTeX math mode.
TeXForm parses this entry as a character leaf mapped to U+21D5 (UP DOWN DOUBLE ARROW).