# Why does numcases uses a different bracket to cases?

\documentclass{article}
\usepackage{amsmath}
\usepackage{cases}
\begin{document}
Cases:
$$\begin{cases} N + N/4 \\ 6-W_{|N|} \end{cases}$$
Numcases:
\begin{subnumcases}{}
N +  N/4  \\
6-W_{|N|}
\end{subnumcases}
\end{document}


I would like to have the sub-numbering of subnumcases but with the standard bracket of cases.

You can use empheq which is better than cases for this task:

\documentclass{article}
\usepackage{amsmath}
\usepackage{empheq}

\usepackage{cases}
\begin{document}
\subsubsection*{Cases}
$\begin{cases} N + N/4 \\ 6-W_{|N|} \end{cases}$
\subsubsection*{Numbered cases}
\begin{empheq}[left=\empheqlbrace]{align}
&  N + N/4  \\
&  6-W_{|N|}
\end{empheq}
\subsubsection*{Subnumbered cases}
\begin{subequations}
\begin{empheq}[left=\empheqlbrace]{align}
&  N + N/4  \\
&  6-W_{|N|}
\end{empheq}
\end{subequations}
\end{document}


You get the same alignment if you use

\left\{ \begin{aligned} N + N/4 \\ 6-W_{|N|} \end{aligned} \right.


for the first.

Using for example, numcases instead of cases you will have the standard bracket. See the manual http://mirrors.ibiblio.org/CTAN/macros/latex/contrib/cases/cases.pdf pag. 2. The size is the same of the bracket.

\documentclass{article}
\usepackage{amsmath,verbatim}
\usepackage{cases}
\begin{document}
\begin{verbatim}
with numcases:
\end{verbatim}

\begin{numcases}{}
N + N/4  \\
6-W_{|N|}
\end{numcases}
\begin{verbatim}
with subnumcases:
\end{verbatim}

\begin{subnumcases}{}
N +  N/4  \\
6-W_{|N|}
\end{subnumcases}
\end{document}

• Doesn't this make both brackets wrong? Also numbering is now wrong. – Snobbish Hi-rep users Apr 25 at 16:33
• @valerie Now is it correct? – Sebastiano Apr 25 at 16:43
• No, look at bracket, they are totally different. Also your code and image are different. – Snobbish Hi-rep users Apr 25 at 16:51
• @valerie, curly braces are equal. however it seems that this fact Sebastiano emphasize with green rectangles using other tool on equation image. – Zarko Apr 25 at 17:24
• @Sebastiano, i suggest you to remove green rectangle from equation image. it seem that they confuse people. – Zarko Apr 25 at 17:26