2

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.

11
  • 1
    Always post full minimal examples. Also cases already use \left\{ so it will not help much.
    – daleif
    Mar 4, 2015 at 9:24
  • @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 4, 2015 at 9:25
  • @daleif If that's the case, I'll change my question to: "How to make a thicker brace?"
    – rubik
    Mar 4, 2015 at 9:26
  • 1
    This answer, tex.stackexchange.com/questions/229253/…, might give some ideas. Mar 4, 2015 at 11:46
  • 5
    This answer by egreg, tex.stackexchange.com/questions/35891/…, also goes to the heart of it, though isn't quite the same as the earlier reference I gave. Mar 4, 2015 at 11:50

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