Math & Science ⇒ Redefine '\sum' Command

[deangelo]

Hello guys!

I'm trying to change the command \sum, using the following code:

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\renewcommand{\sum}{\displaystyle\sum}

But at the time of compilation shows the following error:

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TeX capacity exceeded, sorry [main memory size=3000000] ...)

What should I do?

[Stefan Kottwitz]

Hi,

there's a recursion. You could save the original command into a macro and use that for redefinition:

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\let\oldsum\sum
\renewcommand{\sum}{\displaystyle\oldsum}

Stefan

[deangelo]

Thank you Stefan!
Really needed this!