In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+2288 (NEITHER A SUBSET OF NOR EQUAL TO).
\nsubseteqqSymbol
The ⊈ symbol (Neither a subset of nor equal to, U+2288), written as \nsubseteqq in LaTeX math mode.
The ⊈ symbol (Neither a subset of nor equal to, U+2288), written as \nsubseteqq in LaTeX math mode.
TeXForm parses this entry as a character leaf mapped to U+2288 (NEITHER A SUBSET OF NOR EQUAL TO).