Parametric and Kinetic Minimum Spanning Trees

We consider the parametric minimum spanning tree problem, in which we are given a graph with edge weights that are linear functions of a parameter and wish to compute the sequence of minimum spanning trees generated as varies. We also consider the kinetic minimum spanning tree problem, in which represents time and the graph is subject in addition to changes such as edge insertions, deletions, and modifications of the weight functions as time progresses. We solve both problems in time O(n2/3 log4/3 n) per combinatorial change in the tree (or randomized O(n2/3 log n) per change). Our time bounds reduce to O(n1/2 log3/2 n) per change (O(n1/2 log n) randomized) for planar graphs or other minor-closed families of graphs, and O(n1/4 log3/2 n) per change (O(n1/4 log n) randomized) for planar graphs with weight changes but no insertions or deletions.

• Type: Conference
• Year: 1998
• Where: FOCS
• Authors: Pankaj K. Agarwal, David Eppstein, Leonidas J. Guibas, Monika Rauch Henzinger
• Keywords: FOCS 1998, Minimum Spanning Tree, Parametric Minimum Spanning, Spanning Tree Problem, Theoretical Computer Science