Dear all I this is part of the latex code that i am using in Lyx,
\mathrm{pro}\mathrm{j}_{H_{v,t}}\left(\widetilde{F}_{e\in
E^{+}\left(v\right),m\in M,t}\left(\mathbf{p}\right)_{v\in V,t\in
T}\right):=\begin{cases}
\widetilde{F}_{e\in E^{+}\left(v\right),m\in M,t}\left(\mathbf{p}\right) & if
& \sum_{e\in E^{^{+}}(v)}\sum_{m\in
M}p_{e,m,t}\leq\frac{P_{\bar{v}}^{Max}}{\left|E^{^{+}}(\bar{v})\right|\times\left|M\right|}\\
c & if & \sum_{e\in E^{^{+}}(v)}\sum_{m\in
M}p_{e,m,t}>\frac{P_{\bar{v}}^{Max}}{\left|E^{^{+}}(\bar{v})\right|\times\left|M\right|}\end{cases}
when I try to generate the pdf file i have the followind text
"c & &
\sum_{e\in E^{^{+}}(v)}\sum_{m\in M}p_{e,m,t}>\frac{P_{\bar{v}...
You have given more \span or & marks than there were
in the preamble to the \halign or \valign now in progress.
So I'll assume that you meant to type \cr instead.
"
I can generate the pdf file with 2 columns but I have a problem trying to add
the third 3 column.
I am including ntheorem class I dont know if this is the problem.
Thanks for you help.
Carlos Sosa Paz
