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\subseteq + \circ as a single symbol (“open subset”)

Is it possible to superimpose a variable size \circ on \sum to compose a symbol just like \oint?

marked as duplicate by clemens, ienissei, Seamus, Stephen, Werner Nov 17 '12 at 1:39

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LuaTeX/XeTeX with XITS Math

The symbol ⨊ is Unicode character U+2a0a Modulo two sum. It can be used directly with LuaTeX or XeTeX if the glyph is supported by the used fonts. Example:

\setmathfont{XITS Math}
\[ ⨊ \] % or \modtwosum


Package fdsymbol

Another font that directly provides the symbol is fdsymbol:

\[ \modtwosum \]



It is also possible to superimpose the symbols, for example:


    \hbox to \wd0{%
      \hspace{0pt plus #2fil}%
      \hspace{0pt plus 1fil}%
      \hspace{0pt plus -#2fil}%

\[ \modtwosum \]


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