[Tugindia] cases with multiple tabs
Herbert Voss
Herbert.Voss at alumni.TU-Berlin.DE
Wed Aug 20 22:41:42 CEST 2003
Ashis Kumar Mal schrieb:
> I tried to use cases environment, but unable
> to produce any output. I am in doubt wheather
> cases can be nested. Moreover, in cases I can't
> use more than one tab(&).
> I wish to align "if" s and "<" s .
maybe this helps
Herbert
\documentclass[12pt]{article}
\usepackage{amsmath}
\begin{document}
\[
z=
\begin{cases}
f(x) \begin{cases}
+x & \text{if}\quad\frac{\hphantom{3}N}{4} < x < \frac{3N}{4}\\
-2x & \text{if}\quad\frac{3N}{4} < x < N
\end{cases}\\
~\\
f(y) \begin{cases}
-2x & \text{if}\quad\frac{\hphantom{3}N}{4} < x < \frac{3N}{4}\\
+x & \text{if}\quad\frac{3N}{4} < x < N
\end{cases}\\
\end{cases}
\]
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