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Can't find any way to correctly write these two special brackets without having spacing between the symbols that compose them.

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Apparently no package is found by Detexify

egreg
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Zanomate
  • 13
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    See http://tex.stackexchange.com/questions/100966/defining-scalable-white-curly-brackets-and-and, for one case, and this, http://tex.stackexchange.com/questions/324173/defining-a-new-bracket-style, for the other – Steven B. Segletes Sep 20 '16 at 11:36
  • Perfect. It was exactly what I was looking for. thx. – Zanomate Sep 20 '16 at 11:48

1 Answers1

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The XITS font has your desired symbols. You can easily load it using unicode-math.

\documentclass{article}
\usepackage{unicode-math}
\setmathfont{Latin Modern Math}
\setmathfont[range={\llangle,\rrangle,\lBrace,\rBrace}]{XITS Math}
\begin{document}
$\llangle \rho \rrangle$

$\lBrace \varphi \rBrace$
\end{document}

enter image description here

Henri Menke
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  • +1. You should probably "move" your answer -- or ask the moderators to do it for you... -- to one of the older queries. (I would suggest http://tex.stackexchange.com/q/100966/5001.) You may also want to highlight more explicitly that this approach requires LuaLaTeX and/or XeLaTeX. – Mico Sep 20 '16 at 12:55