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The network on which to operate.
What to deliver.
Used in:
The departure node of the demand. Must be >= 0.
The destination node of the demand. Must be >= 0.
The quantity to carry (must be > 0).
Used in:
The start node of an arc. Must be >= 0. We do allow multi-arcs but not self-arcs.
The end node of arcs. Must be >= 0.
The variable cost per unit of commodity demand on arcs. Must be >= 0.
The fixed charge for using an arc. Must be >= 0.
The total capacity of arcs. Must be > 0.