## FANDOM

143 Pages

This command generates the summation operator, $\sum$. The difference between this and \Sigma, which generates the capital letter $\Sigma$, is that \sum appears larger, and that it supports the limits to be displayed below and above the symbol.

The following example illustrates the difference between \sum and \Sigma. $\sum_{n=1}^\infty\frac{1}{2^n}=1\qquad\Sigma_{n=1}^\infty\frac{1}{2^n}=1$