# On notation for function mapping

How can I write the following multiple mappings in a more compact and elegant way?

\begin{align} \bar \mu \leq 0&: \lim \limits_{\rho \to \infty } \mu \to 0 \\ \bar \mu \geq 1&: \lim \limits_{\rho \to \infty } \mu \to 1 \\ \bar \mu \in (0,1)&: \lim\limits_{\rho \to \infty } \mu \to \bar \mu \\ \end{align}

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It's hard to tell what you're asking. Please add some context to your question. In particular, what is $\rho$, and how does $\mu$ depend on it? –  Andrew Uzzell Feb 28 '13 at 12:13

Your notation makes little sense to me, but I think what you are trying to say can be written as follows: $$\lim_{\rho\to\infty}\mu=\begin{cases}0&\bar\mu\le0\\1&\bar\mu\ge1\\\bar\mu&\bar\mu\in(0,1)\end{cases}$$