Triple lower limits in summation sign (urgent)

**Jodles** · October 30th 2009, 03:11 AM

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!

**CaptainBlack** · October 30th 2009, 04:24 AM

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!

[tex]\sum_
{ \tiny \begin{array}{c} x>1 \\ y<8\\ u \in A \end{array} }
x+y+u[/tex]

gives:

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

**flyingsquirrel** · October 31st 2009, 01:27 AM

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...

[tex]\sum_{\substack{i \neq j\\ i, j \neq r, s\\ i, j \neq s, r}} A_{ij}[/tex] gives

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

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