We have < and \ll. What about double \prec, i.e. something like \prec\prec but with spacing as in \ll?

Remark. I could not find an answer in http://detexify.kirelabs.org/classify.html or http://www.ctan.org/tex-archive/info/symbols/comprehensive/. I am not interested, how to construct this symbol from two \prec's (I know how to reduce the distance), but I am searching for a symbol from some package, even so strange as MnSymbol.

  • 3
    STIX Math (or XITS Math), Asana Math and Lucida Bright Math have it (U+2ABB); probably also Cambria Math. It's not included in the TeX Gyre Unicode math fonts.
    – egreg
    Sep 1, 2014 at 8:51
  • 1
    @egreg Your comment is a valuable answer for me, so transforming it into an answer would be probably useful for next seekers. Sep 1, 2014 at 9:12
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    This question and tex.stackexchange.com/questions/149052/variation-on-prec-prec do seem to have quite a bit of overlap: would it be OK to merge? I'd hope that some of the answers will be useful to you and I can see that both questions do seem to cover the 'single symbol' part at least in principle.
    – Joseph Wright
    Sep 1, 2014 at 12:49

3 Answers 3


The mathb font (from mathabx) has an \llcurly and a \ggcurly symbols. Here is how to use them without loading the whole package:


<-6> mathb5 <6-7> mathb6 <7-8> mathb7
<8-9> mathb8 <9-10> mathb9
<10-12> mathb10 <12-> mathb12

\[ a \llcurly b \quad a \ggcurly b \]


enter image description here

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    Oh, "parallel" curved lines look much better then a simple translation of \prec! Sep 1, 2014 at 12:18
  • Is this line really necessary: \def\blueDiamond{\mathbin{\color{SteelBlue3}\blacklozenge}} ?
    – Rauni
    Dec 19, 2014 at 12:04
  • @Rauni: That's right. I think I took the preamble from a previous code for an answer to a more less related question and forgot to check what had to be deleted. It's removed now. Thanks for pointing that.
    – Bernard
    Dec 19, 2014 at 12:09
  • According to tex.stackexchange.com/a/218683/23484, it should be "mathb5", not "mathab" (right after <-6>).
    – Rauni
    Dec 19, 2014 at 12:25
  • I've seen that, and corrected the mistyping.
    – Bernard
    Dec 19, 2014 at 12:27

The unicodes are U+2ABB and U+2ABC. Here are some examples with the fonts I am having available (in order of increasing uglyness):

% arara: lualatex








    %\setmathfont{cambria-math}\test % not on my system

enter image description here


Here's a homemade construction.

$a \pprec b$

enter image description here

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