In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+228B (SUPERSET OF WITH NOT EQUAL TO).
\supsetneqSymbol
The ⊋ symbol (Superset of with not equal to, U+228B), written as \supsetneq in LaTeX math mode.
The ⊋ symbol (Superset of with not equal to, U+228B), written as \supsetneq in LaTeX math mode.
TeXForm parses this entry as a character leaf mapped to U+228B (SUPERSET OF WITH NOT EQUAL TO).