# Triple lower limits in summation sign (urgent)

• October 30th 2009, 03:11 AM
Jodles
Triple lower limits in summation sign (urgent)
Hi!

How do I get several limits below each other using the summation sign? I.e. $\sum\limits_{i \neq j} A_{ij}$, but I would also like $i, j \neq r, s$ and $i, j \neq s, r$ on two lines below the first limit...

Thanks!:)
• October 30th 2009, 04:24 AM
CaptainBlack
Quote:

Originally Posted by Jodles
Hi!

How do I get several limits below each other using the summation sign? I.e. $\sum\limits_{i \neq j} A_{ij}$, but I would also like $i, j \neq r, s$ and $i, j \neq s, r$ on two lines below the first limit...

Thanks!:)

$$\sum_ { \tiny \begin{array}{c} x>1 \\ y<8\\ u \in A \end{array} } x+y+u$$

gives:

$\sum_{ \tiny \begin{array}{c} x>1 \\ y<8\\ u \in A \end{array} } x+y+u$
• October 31st 2009, 01:27 AM
flyingsquirrel
Quote:

Originally Posted by Jodles
How do I get several limits below each other using the summation sign? I.e. $\sum\limits_{i \neq j} A_{ij}$, but I would also like $i, j \neq r, s$ and $i, j \neq s, r$ on two lines below the first limit...

$$\sum_{\substack{i \neq j\\ i, j \neq r, s\\ i, j \neq s, r}} A_{ij}$$ gives

$\sum_{\substack{i \neq j\\ i, j \neq r, s\\ i, j \neq s, r}} A_{ij}$