Angus Leeming wrote:
>
> Lyx file attached. Should enable you to modify to suit.
Using an array is not a good solution, because the size of the subscript
will be wrongs.
Paul Smith wrote:
> 2. write:
>
> \[
> \sum_{\substack{0<a<n\\
> 0<b<m}
> }a*b\]
>
> 3. highlight what you have just written;
>
> 4. convert it to mathed mode by then selecting Insert->Math->Inline
> Formula or the appropriate shortcut (M-c m) if using emacs-style bindings.
This is the correct solution, but it can be typed directly in the math editor:
\sum <space>
_\substack <space>
0<a<n <ctrl+enter><down>
0<b<m <right><right>
a*b
