0
$\begingroup$

I've got a quick notation question.

Currently I'm trying to do a sum over all edges of a graph as so: $$ \sum_{i, j\ \in {E}}^{m}\frac{J_{i j}}{4}Z_{i} $$

What notation would indicate I only wanted to sum the terms over edges connected to the node $i$ ? This doesn't seem right as it has the subscript $j$, which isn't referenced at all.

$$ \sum_{i\ \in {E}}^{m}\frac{J_{i j}}{4}Z_{i} $$

$\endgroup$

1 Answer 1

1
$\begingroup$

$$\sum_{j: \{i,j\}\in E}\cdots$$

$\endgroup$

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .