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Not sure if LaTeX counts as programming, or if my question even makes sense, but I have this LaTeX expression (or what you call it):
\sum_{k=1}^n k^2 = 1+4+9+\ldots +n^2 = \frac{1}{3}n^3 + \frac{1}{2}n^2 + \frac{1}{6}n The problem is that the k=1 and n comes next to, i.e. after, the sum symbol, instead of above and below it. Is there a way I can change this? I have tried to show visually what I mean below. The sum symbol represented as Xs :
n XXX XXX n XXX vs XXX XXX XXX k=1 k=1 I want the first kind, but am getting the second.
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Sums and products Like integral, sum expression can be added using the \sum_{lower}^{upper} command. In similar way you can obtain expression with product of a sequence of factors using the \prod_{lower}^{upper} command.
If you're willing to use the Mathtime Professional II font package, you could use its \xl\sum , \XL\sum , \XXL\sum etc commands to get larger summation symbols.
Use as \bm{\Sigma} .
Try
\sum\limits_{k=1}^n k^2 if you want the sum limits to appear above and below the sum sign in an inline equation.
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