I would like to typeset a symbol that means "element of or equal to," which is just the element symbol with a short horizontal line underneath.

I tried $\underline{\in}$, but that makes the underline too thick:

enter image description here

Is there a way to typeset this symbol directly, or to make the underline thinner?

  • 3
    Welcome to TeX.SX! What is element of or equal to?? I don't know this kind of math
    – user31729
    Nov 24 '14 at 17:38
  • 2
    Are you sure you are not looking for the \subseteq symbol? Nov 24 '14 at 17:39
  • 1
  • 1
    Yes, I'm not looking for \subseteq. The symbol is depicted here: s17.postimg.org/dos0j706n/eleq.png I tried DeTexify, but it didn't give any results that were right.
    – Nishant
    Nov 24 '14 at 17:47
  • 1
    @ThomasF.Sturm The symbol may be used in the theory of ordinals, where the (strict) order relation is precisely “being an element of”.
    – egreg
    Nov 24 '14 at 20:37

This is a first approximation:



enter image description here

This automatically changes size in subscripts.

You may prefer a solution with a roundcap bar below the main symbol:



enter image description here


The character ⋸ is the Unicode character U+2278, see Barbara Beeton's comment.

I found two math fonts, which contains the charactes:

  • Asana Math
  • XITS Math

They can be used with XeTeX or LuaTeX. With package unicode-math, the command is \isinvb, or the character can be given directly as UTF-8 character or the ^^^^-escape notation can be used: ^^^^22F8.

The following example shows:

  • The direct glyphs (only Asana Math and XITS Math).
  • The macros \isinvbA and \isinvbB.
    • They compose the symbol with ∈ (\in) and the minus sign. If the minus sign is too long (Latin Modern Fonts), then it is scaled horizontally to fit the symbol ∈.
    • The gap is estimated by the middle of ten percent of the height of ∈ and 150% of the line thickness of the minus sign.
    • Rounded line caps are kept (but subjected to the horizontal scaling in case of Latin Modern).
    • Asana Math centers the complete symbol around the math axis. This is implemented by \isinvbA by using \vcenter.
    • XITS Math keeps the symbol in and adds the line under it. This is implemented by \isinvbB by using \vtop.
  • The symbols can be used in all math styles.

Example and test file:


  \fbox{$\isinvb$}% U+22F8


  % #1: math style   
  % #2: \vcenter or \vtop
    \copy0 %
    \kern.5\dimexpr3\dimen@ + .1\ht0\relax
    \ifdim\wd2>\wd0 %
      \hbox to \wd0{\hss\resizebox{\wd0}{\ht2}{\copy2}}%
      \hbox to \wd0{\hss\copy2}%


  \fontfamily{lmvtt}\tiny #1 &
\begin{tabular}{@{}l@{ }l@{ }l@{\quad}l@{ }l@{}}



  • \tracinglostchar=2 is quite important, because then TeX will report characters, which are not present in the used fonts, e.g.:

    Missing character: There is no ⋸ (U+22F8) in font "[texgyrebonum-math.otf]:mode=base;script=math;language=DFLT;"!
  • Macros \isinvbA and \isinvbB do not depend on LuaTeX or XeTeX, they can also be used with pdflatex or latex.

  • The \fbox commands show the bounding boxes.

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