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\section{Minimizing Losses}  Recall that, taken together, (\ref{eq:IGAgain}) (\ref{eq:TotalLossExpand})  and the newly demonstrated zero row sum property of $Y_{GGM}$, imply that losses are minimized when generator voltages are equalized. As such, an optimal dispatch can be directly calculated by setting all $V_{G}$ equal to the slack value, $1∠0^°$, and solving the resulting loadflow problem by the familiar iterative techniques. More insightfully, though, one can use the previously derived block matrix to see how this optimal dispatch relates to load current demands. Recall from (\ref{eq:YMod}):