@cached<EOL><INDENT>def central_vertices(self):<DEDENT>
max_distances = self.distances.max(<NUM_LIT:0>)<EOL>max_distances_min = max_distances[max_distances > <NUM_LIT:0>].min()<EOL>return (max_distances == max_distances_min).nonzero()[<NUM_LIT:0>]<EOL>
Vertices that have the lowest maximum distance to any other vertex