3/2-Approximation for the Forest Augmentation Problem
Abstract
We describe a 32-approximation algorithm for the Forest Augmentation Problem (FAP), which is a special case of the Weighted 2-Edge-Connected Spanning Subgraph Problem (Weighted 2-ECSS). This significantly improves upon the previous best ratio 1.9973, and proceeds toward the goal of a 32-approximation algorithm for Weighted 2-ECSS.
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