[Tex/LaTex] mathtools brackets larger than \Bigg

delimitersmathtools

I'd like to use the syntax of the mathtools package to generate brackets larger than \Bigg.

One can create larger brackets than \Bigg of specified size using

However, that solution doesn't work with the \DeclarePairedDelimiter construct of mathtools.

See the MWE below. I suspect that what's needed is \Vastl, \Vastr, and \Vastm commands.

\documentclass{article}


\usepackage{mathtools}
\makeatletter
\newcommand{\vast}{\bBigg@{4}}
\newcommand{\Vast}{\bBigg@{5}}
\makeatother

\DeclarePairedDelimiter{\parens}()

\begin{document}

\[
 \parens[\Bigg]{\dfrac{\dfrac{y}{x}}{\dfrac{a}{b}}}
\]

\[
 \Vast({\dfrac{\dfrac{y}{x}}{\dfrac{a}{b}}} \Vast)\qquad
 \parens[\Vast]{\dfrac{\dfrac{y}{x}}{\dfrac{a}{b}}}  % does not work
\]
\end{document}

Best Answer

Yes, your suspicion is right. Simply define:

\newcommand{\vastl}{\mathopen\vast}
\newcommand{\vastm}{\mathrel\vast}
\newcommand{\vastr}{\mathclose\vast}
\newcommand{\Vastl}{\mathopen\Vast}
\newcommand{\Vastm}{\mathrel\Vast}
\newcommand{\Vastr}{\mathclose\Vast}

and you can use \vast and \Vast with \DeclarePairedDelimiter.

MWE:

\documentclass{article}


\usepackage{mathtools}
\makeatletter
\newcommand{\vast}{\bBigg@{4}}
\newcommand{\Vast}{\bBigg@{5}}
\newcommand{\vastl}{\mathopen\vast}
\newcommand{\vastm}{\mathrel\vast}
\newcommand{\vastr}{\mathclose\vast}
\newcommand{\Vastl}{\mathopen\Vast}
\newcommand{\Vastm}{\mathrel\Vast}
\newcommand{\Vastr}{\mathclose\Vast}
\makeatother

\DeclarePairedDelimiter{\parens}()

\begin{document}

\[
 \parens[\Bigg]{\dfrac{\dfrac{y}{x}}{\dfrac{a}{b}}}
\]

\[
 \Vast({\dfrac{\dfrac{y}{x}}{\dfrac{a}{b}}} \Vast)\qquad
 \parens[\Vast]{\dfrac{\dfrac{y}{x}}{\dfrac{a}{b}}}  % works now
\]
\end{document}

Output:

Related Solutions

[Tex/LaTex] About big parenthesis larger than Bigg

The ams parenthesis of specific size are typeset by using \left and \right and putting in an invisible "thing" of a certain height to ensure that they are big enough. Mimicking that, you could do: \left(\rule{0cm}{2cm}\right. to get a left parenthesis of 2cm height. Note that the AMS command also adds a little horizontal space which you might need to put in as well. If you do this often, you could easily define new sizes:

\makeatletter
\newcommand{\vast}{\bBigg@{4}}
\newcommand{\Vast}{\bBigg@{5}}
\makeatother

Then in your document:

\[
\Vast( \frac{\prod_0^\infty k}{\sum_0^\infty n} \Vast)
\]

produces:

big parentheses

I recommend also taking a look at Vertically asymmetric size variation for parentheses about vertically centring parentheses.

(Note I've assumed that you're using amsmath since you tag it with amsmath and the commands \big and so forth are ones that amsmath produces. If you're using a different package to get these commands, then this solution won't work.)

[Tex/LaTex] Look for a bigger delimiter than \Bigg

You could scale / using \scalebox{<factor>}{<stuff>} from the graphicx package:

enter image description here

\documentclass{article}
\usepackage{amsmath}% http://ctan.org/pkg/amsmath
\usepackage{graphicx}% http://ctan.org/pkg/graphicx
\begin{document}
\[\left.
  \begin{vmatrix}
    a_{11}&a_{12}&a_{13}\\
    a_{21}&a_{22}&a_{23}\\
    a_{31}&a_{32}&a_{33}
  \end{vmatrix}\middle/\begin{vmatrix}
    b_{11}&b_{12}&b_{13}\\
    b_{21}&b_{22}&b_{23}\\
    b_{31}&b_{32}&b_{33}\\
    b_{41}&b_{42}&b_{43}
  \end{vmatrix}
\right.\]
\[
  \begin{vmatrix}
    a_{11}&a_{12}&a_{13}\\
    a_{21}&a_{22}&a_{23}\\
    a_{31}&a_{32}&a_{33}
  \end{vmatrix}\scalebox{1.5}{\Bigg/}\begin{vmatrix}
    b_{11}&b_{12}&b_{13}\\
    b_{21}&b_{22}&b_{23}\\
    b_{31}&b_{32}&b_{33}\\
    b_{41}&b_{42}&b_{43}
  \end{vmatrix}
\]
\end{document}

Note that this scales / both vertically and horizontally, increasing the width of the symbol as well. To minimize this, I've only scaled \Bigg/. To see the difference, consider (say) \raisebox{-2ex}{\scalebox{4.5}{/}}.

Another alternative could be to rotate a vertical rule by (say) 15 degrees clockwise. For this you could use

\rotatebox{-15}{\rule[-1.8\baselineskip]{0.4pt}{4\baselineskip}}

The above vertical rule has a fixed width of 0.4pt, which you can change to your liking.

Best Answer

Related Solutions

[Tex/LaTex] About big parenthesis larger than Bigg

[Tex/LaTex] Look for a bigger delimiter than \Bigg

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