6

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}
|improve this question|||||
  • Please put your code in Code Samples (the '{}'-button) to make it more readable – Didii Jul 23 '12 at 13:56
  • 1
    Here is the same issue in another environment. Solution is the same: tex.stackexchange.com/questions/3262/… – Didii Jul 23 '12 at 14:03
  • 3
    In LaTeX, rather use \frac{<num>}{<denom>} than <num>\over<denom>. – Werner Jul 23 '12 at 14:18
5

Consider using \limits as in the following: 

    \begin{equation}
\Delta{t}\leq\left[{C_i}\over{{\sum \limits_{j}}{\frac{1}{R_{ij}}}}\right]_{min}
\label{eq:stability_criteria_3}
     \end{equation}

(Doesn't this make this ugly though?)

|improve this answer|||||
8

Adding a \displaystyle does the job.

\begin{equation} \Delta{t}\leq\left[{C_i}\over{{\displaystyle \sum_{j}}{\frac{1}{R_{ij}}}}\right]_{min} \label{eq:stability_criteria_3} \end{equation}
|improve this answer|||||
  • The \displaystyle instruction will change both the size of the summation symbol and the default placement of the limit(s) of summation. – Mico Dec 20 '12 at 13:24

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.