Jose Monteiro wrote:
>
> int latex, the command to do it with a sum is:
>
> \begin{equation}
> \sum_{\substack{0\le i\le m\\ 0<j<n}} P(i,j)
> \end{equation}
>
> in lyx, the line break is being ignored, and i'm getting only a
> simple subscript, with both lines concatenated.
i get exactly what you want, try to write all in one line and no space
before P(i,j).
in lyx you can use math mode, the sum symbol, insert "_" for subscript and
now choose a matrix with several lines and one column. so you have so
much lines
as you like.
Herbert
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