منابع مشابه
Approaching $\frac{3}{2}$ for the $s$-$t$-path TSP
We show that there is a polynomial-time algorithm with approximation guarantee 3 2 + ε for the s-t-path TSP, for any fixed ε > 0. It is well known that Wolsey’s analysis of Christofides’ algorithm also works for the s-t-path TSP with its natural LP relaxation except for the narrow cuts (in which the LP solution has value less than two). A fixed optimum tour has either a single edge in a narrow ...
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Amedian of a sequence π = x1, x2, . . . , xk of elements of a finite metric space (X, d) is an element x for which ∑k i=1 d(x, xi) is minimum. The function M with domain the set of all finite sequences on X and defined by M(π) = {x : x is a median of π} is called the median function on X, and is one of the most studied consensus functions. Based on previous characterizations of median sets M(π)...
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ژورنال
عنوان ژورنال: Tohoku Mathematical Journal
سال: 1951
ISSN: 0040-8735
DOI: 10.2748/tmj/1178245523