TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

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.

share|improve this question
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 '14 at 8:51
@egreg Your comment is a valuable answer for me, so transforming it into an answer would be probably useful for next seekers. – Przemysław Scherwentke Sep 1 '14 at 9:12
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 '14 at 12:49
up vote 11 down vote accepted

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

share|improve this answer
Oh, "parallel" curved lines look much better then a simple translation of \prec! – Przemysław Scherwentke Sep 1 '14 at 12:18
Is this line really necessary: \def\blueDiamond{\mathbin{\color{SteelBlue3}\blacklozenge}} ? – Rauni Dec 19 '14 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 '14 at 12:09
Glad to help :) – Rauni Dec 19 '14 at 12:22
According to tex.stackexchange.com/a/218683/23484, it should be "mathb5", not "mathab" (right after <-6>). – Rauni Dec 19 '14 at 12:25

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

share|improve this answer

Here's a homemade construction.

$a \pprec b$

enter image description here

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.