# Numbering equations in cases environment separately

I have a problem with separate numbering of equations. My code is:

    \documentclass[10pt,a4paper]{article}
\usepackage{amsmath}
\usepackage[subnum]{cases}

\begin{document}
\begin{numcases}{n=}
y
\begin{cases}
x<2
\\
x>3
\end{cases}
\\
0
\end{numcases}
\end{document}


I'd like each of three cases to have their own number on its line. Can someone help me?

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Welcome to TeX.sx! –  texenthusiast Mar 25 '13 at 12:12
Welcome to TeX.sx! Please add a minimal working example (MWE) that illustrates your problem. It will be much easier for us to reproduce your situation and find out what the issue is when we see compilable code, starting with \documentclass{...} and ending with \end{document}. –  Jubobs Mar 25 '13 at 12:14
It's not clear what you want to achieve: do you want nested numcases? –  egreg Mar 25 '13 at 12:32
similar question: Separate labels in cases –  barbara beeton Mar 25 '13 at 12:34
Thank you for help, but I have there two cases environments and that is why I have problem. Is there any way to number equations separately if there are two cases environments used inside each other? –  Suzie Mar 25 '13 at 12:59
show 1 more comment

Here is a way to go using some ideas from this answer:

\begin{numcases}{n=}
\makebox[0pt][l]{\smash{\raisebox{-.5\baselineskip}{${} y \hspace{0.3em} \left\{\rule{0pt}{1.1\baselineskip}\right.$}}}
\hphantom{{} y \hspace{1em} {}}\;\;x<2\\
\hphantom{{} y \hspace{1em} {}}\;\;x>3\\
0
\end{numcases}


The output is the following:

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