Abstract
Under study is the maximum 2 peripatetic salesmen problem which consists in finding two edge-disjoint Hamiltonian cycles with maximal total weight in a complete undirected graph. We present a cubic time approximation algorithm for this problem with the performance guarantee 7/9 which is the best known estimation by now. We also present a modification of this algorithm for the case when the weights of graph edges are values in a given range [1, q] with the performance guarantee (7q + 3)/(9q + 1) which is also the best known estimation by now and has cubic time complexity too.
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