Large delimiters, multiline equations

[Neal Becker]

I have an equation that has to be split (to fit into beamer
presentation).  It has large delimiters that span the lines.  Does lyx
have any facility to help with this?  I did get a useable result, but
only with a lot of ERT.  Lyx seems not helpful here, is there any way
other than ERT to get "\Biggl. ... \Biggr]"?  Or "\right."?

Here is what I wanted:

\begin{multline*}

\mathbf{X}_{N_{C}\times S\times
A}=\left[\left[\left[\sum_{n}m1_{p+cL_{c}+nS}m2_{p+cL_{c}+(n+\tau)S}^{*}\right.\right.\right.,\\

\Biggl.\Biggl.\Biggl.\tau\in[-A/2\dots A/2]\Biggr],p\in[0\dots
S-1]\Biggr],c\in[0\dots N_{c}-1]\Biggr]

\end{multline*}


-- 
Those who don't understand recursion are doomed to repeat it