Letter to the Editor—Remarks on Network Simplification

Arthur M. Hobbs
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Arthur M. Hobbs: National Bureau of Standards, Washington, D. C.

Operations Research, 1967, vol. 15, issue 3, 548-551

Abstract: In “The Use of Wye-Delta Transformations in Network Simplification,” Sheldon B. Akers, Jr. stated two conditions that together were supposedly sufficient for the validity of delta-wye transformations on networks with finite vertex capacities. This letter gives a counterexample to the sufficiency of the two conditions and demonstrates the necessity of the first condition to delta-wye transformations.

Date: 1967
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