If a connection is presented with one variable (lossless), then it should not have variable costs either, since they will be negative in the opposite direction. The connection must use two variables if variable costs are included. Probably not covered at the moment.
If a connection is presented with one variable (lossless), then it should not have variable costs either, since they will be negative in the opposite direction. The connection must use two variables if variable costs are included. Probably not covered at the moment.