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.