Numbering equations in cases environment separately

Question

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}

Output

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

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}. — jub0bs, 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
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
I think yes, what I want might be nested numcases. Is that possible? — Suzie, Mar 25 '13 at 15:03

score 4 · Answer 1 · edited Jun 16 '17 at 07:55

4

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:

Output

edited Jun 16 '17 at 07:55

David Carlisle

757,742

answered Aug 20 '13 at 18:04

Ludovic C.

8,888

Numbering equations in cases environment separately

1 Answers1

Linked