I want   cover to denote the covering relation. I can't find this symbol in my standard sources for this sort of thing. Detextify has also failed in this. How can I get this relational symbol?

  • Isn't it a \prec symbol? – Malipivo Mar 24 '15 at 13:41
  • @Malipivo No. The one I ask about has only straight lines. – Git Gud Mar 24 '15 at 13:43
  • Very well, in case we wouldn't find that symbol, we could draw our own symbol, e.g. in TikZ. – Malipivo Mar 24 '15 at 13:46
  • Is a symbol like in this picture good enough? – egreg Mar 24 '15 at 13:46
  • @egreg No, but the second option in your answer is looking good. Thanks. – Git Gud Mar 24 '15 at 19:12

If you can't use unicode-math, here you find a couple of possibilities:





$x\coveringA y_{\coveringA}$

$x\coveringB y_{\coveringB}$


enter image description here

If you're sure that you won't use the symbol in subscripts or superscripts, then


is more efficient. You can play with the parameters as you wish, in the second solution.

  • I'm sure that I won't use it in subscripts or superscripts. So how exactly do I incorporate \newcommand{\coveringB}{\mathrel{\vcenter{\hbox{\pictcoveringB}}}} into your proposed solution? – Git Gud Mar 24 '15 at 21:44
  • @GitGud Just use the second proposed definition in place of the original one. Of course you don't need to define \coveringA and maybe give \coveringB a better name. – egreg Mar 24 '15 at 21:47

The symbol you are looking for is U+2919. You could use unicode-math in order to get it. It is already defined as \mathrel here.

% arara: lualatex


\setmathfont{XITS Math}
\setmathfont{Cambria Math}
\setmathfont{Asana Math}

enter image description here

Or you choose any font you like and do:

% arara: lualatex


$x\lefttail{code2000.ttf} y$
$x\lefttail{quivira.otf} y$
$x\lefttail{stix-regular.otf} y$
$x\lefttail{symbola.ttf} y$

enter image description here

Some of them will need some vertical adjustment, though.

You may also want to take a look on :

% arara: pdflatex


\begin{tikzcd}[column sep=4mm]
x & y\arrow[no head, tail]{l}

enter image description here

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