I'm modeling a flow problem on graph using sage. Once the graph was ready I've modeled a MILP problem with constraints. I've problems having unique variables.
What I do is to use v = p.new_variable() and subsequently use the v
variable in a loop iterating the edges of the graph in such as:
for origin, destination, attributes in G.edges():
attributes['v_component_for_that_edgs'] = v[('origin', 'destination')]
But at the end some variable are duplicate!
The code producing that strange behavior is attached to this mail.
Is an error of mine or a Sage problem?
Thanks.
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