摘要

The paper presents a 1.692(n)n(O(1))-time polynomial-space algorithm for the traveling salesman problem in an n-vertex edge-weighted graph with maximum degree 4, which improves the previous results of the 1.890(n)n(O(1))-time polynomial-space algorithm by Eppstein and the 1.733(n)n(O(1))-time exponential-space algorithm by Gebauer.