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Simple graphs vs multigraphs #5

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@renepickhardt

At least for maxflow scaling techniques become more efficient on simple graphs O(nm) instead of O(m^2) as for multi graphs as described in https://youtu.be/7QPI3kBIKv4 at around minute 71 mark.

I propose for maxflow computation we can look at a simple graph by virtualizing multi edges. When creating the actual onion and dissecting the flow into paths we can use the multi graph again

Of course only relevant if the same runtime argument holds in mcf scaling. I guess it will

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