finesse.graph.operator_graph.OperatorGraph.sum_rule

OperatorGraph.sum_rule(self, node)

Apply the sum reduction rule to a node in the graph.

Parameters:

nodeint

The index of the node.

Returns:

Tuple[Tuple[int, int, int]]

A tuple of tuples representing the edges that have been reduced. Each tuple contains the indices of the start, mid, and end nodes.

Raises:

Exception

If the graph is null or if an error occurs while applying the rule.