Approximating the Diameter of Planar Graphs in Near Linear Time
Oren Weimann, Raphael Yuster·2011-12-06·via cs.DS updates on arXiv.org
We present a $(1+ε)$-approximation algorithm running in $O(f(ε)\cdot n \log^4 n)$ time for finding the diameter of an undirected planar graph with non-negative edge lengths.