When I use the code below the subscript j
appears to the side of the sum symbol, not underneath. Has anyone got any idea what I'm doing wrong?
\begin{equation}
\Delta{t}\leq\left[{C_i}\over{{\sum_{j}}{\frac{1}{R_{ij}}}}\right]_{min}
\label{eq:stability_criteria_3}
\end{equation}
\frac{<num>}{<denom>}
than<num>\over<denom>
. – Werner Jul 23 '12 at 14:18