Hi,
in a formula I write <math>\frac{\sum_{i=1}^n ...}{...}</math>. The sum
sign appears always in \textmode. I tried to use
<math>\frac{\displaystyle \sum_{i=1}^n ...}{...}</math>, but during
rendering an error occured: unknown function \displaystyle. What can I
do to force \displaystyle ?
Thanks in advance
Sigbert Klinke
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