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I'd like to know if it's possible to increase the thickness of a brace.

The code

\documentclass[oneside]{article}

\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}

\newcommand{\ve}{\textbf}
\newcommand{\veu}{\ve u}
\newcommand{\vev}{\ve v}

\begin{document}
    \begin{equation}
        \begin{cases}
            q_1(\veu) \land q_1(\vev) &= \begin{vmatrix}
                u_2 & v_2\\
                u_3 & v_3
            \end{vmatrix} = u_2v_3 - u_3v_2 = 0\\[1.5em]
            q_2(\veu) \land q_2(\vev) &= \begin{vmatrix}
                u_1 & v_1\\
                u_3 & v_3
            \end{vmatrix} = u_1v_3 - u_3v_1 = 0\\[1.5em]
            q_3(\veu) \land q_3(\vev) &= \begin{vmatrix}
                u_1 & v_1\\
                u_3 & v_3
            \end{vmatrix} = u_1v_3 - u_3v_1 = 0
        \end{cases}
    \end{equation}
\end{document}

The result

screenshot

I think the brace is a bit too thin, and I tried to replace cases with a manual \left\{ but that didn't work.

rubik
  • 771
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    Always post full minimal examples. Also cases already use \left\{ so it will not help much. – daleif Mar 04 '15 at 09:24
  • @daleif I think I posted a full minimal example. There's the template at the top so that it does not have to be repeated two times. – rubik Mar 04 '15 at 09:25
  • @daleif If that's the case, I'll change my question to: "How to make a thicker brace?" – rubik Mar 04 '15 at 09:26
  • it wasn't there when I answered. And your example will never compile as you are using amsmath elements and amsmath is not loaded in your example. I would not bother with an issue like this. Braces look different in different fonts. – daleif Mar 04 '15 at 09:30
  • Still not compilable. – daleif Mar 04 '15 at 09:30
  • Just add amsmath. Short of writing your own brace using tikz I don't think it this is worth improving. – daleif Mar 04 '15 at 09:33
  • @daleif I'm sorry, I forgot about amsmath. I am using many packages, so I forgot about it. So are you saying there is nothing to do? – rubik Mar 04 '15 at 09:40
  • I'm saying it is not worth it. For most documents there are many other things that ought to be improved before one tackle an issue like this. BTW: why \mathbf and not \bm from the bm package? I personally like italic bold face better than upright bold face for vectors. – daleif Mar 04 '15 at 10:08
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    This answer, http://tex.stackexchange.com/questions/229253/adding-braces-around-equations/229254#229254, might give some ideas. – Steven B. Segletes Mar 04 '15 at 11:46
  • @StevenB.Segletes Very nice, thanks! I'll try to implement some of those solutions. – rubik Mar 04 '15 at 11:49
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    This answer by egreg, http://tex.stackexchange.com/questions/35891/import-curly-brackets-from-mathdesign-utopia, also goes to the heart of it, though isn't quite the same as the earlier reference I gave. – Steven B. Segletes Mar 04 '15 at 11:50

0 Answers0