Abstract
AbstractLocating a single facility (the 1‐median problem) on a deterministic tree network is very efficiently solved by Goldman's algorithm. This paper explores the possibility of efficiently solving the 2‐median problem for both deterministic and probabilistic tree networks. Interesting properties (Theorems 1–4) are derived that relate the location of 1‐median to the location of pairs of 2‐medians. Two simple algorithms, the “Improved Link‐Deletion” algorithm for the deterministic case and the “Selective Enumeration” algorithm for the probabilistic case, are presented which somewhat improve existing methods to determine 2‐medians on tree networks.
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