I know how to create a sigma sign for a sum - use the large operator \sum

But how do you show an index, say i running from, say, 1 to n

Further, how do you neatly create two or more indices

Would appreciate any help in this matter

Peter

Printable View

- Jun 29th 2013, 09:04 PMBernhardSigma or sum with index or indicies
I know how to create a sigma sign for a sum - use the large operator \sum

But how do you show an index, say i running from, say, 1 to n

Further, how do you neatly create two or more indices

Would appreciate any help in this matter

Peter - Jun 30th 2013, 07:58 AMPlatoRe: Sigma or sum with index or indicies
- Jun 30th 2013, 01:13 PMemakarovRe: Sigma or sum with index or indicies
The formula mode (inline or display) determined whether operator indices are placed as regular sub/superscripts or directly below/above the operator. You can change this behavior using \limits and \nolimits between an operator and an index.

Concerning two or more indices (I assume something like 0 ≤ i ≤ m and 0 < j < n), you can either write them in one line or use the following example from The LaTeX Companion, 2nd edition (8-3-5, p. 488):

$\displaystyle \sum_{\substack{0 \le i \le m \\ 0 < j < n}} P(i, j)$.

There is also an example

Code:`\sum_{\begin{subarray}{l} i \in \Lambda \\`

0 \le i \le m \\

0 < j < n

\end{subarray}} P(i, j)

- Jun 30th 2013, 07:42 PMProve ItRe: Sigma or sum with index or indicies