We consider instances of the Set Cover problem where each set is of small size. For collections of sets of size at most three, we obtain improved performance ratios of 1.4 + ε, for any constant ε > 0. Similar improvements hold also for collections of larger sets. A corollary of this result is an improved performance ratio of 4/3 for the problem of minimizing the unused colors in a graph coloring.
CITATION STYLE
Halldórsson, M. M. (1996). Approximating k-set cover and complementary graph coloring. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 1084, pp. 118–131). Springer Verlag. https://doi.org/10.1007/3-540-61310-2_10
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