Optimal Linear Arrangement and Optimal Linear Ordering.
Donald L. Adolphson, T. C. Hu · Mathematics Research Center, University of Wisconsin eBooks · 1974
Abstract : Consider a set of n pins and a required number of wire connections between each pair of the pins. The problem is to put the n pins into n holes such that the total wire length is a minimum. The holes are all in a line with adjacent holes at unit distance apart. The authors can abstract the pins and wire connections as a graph G with n nodes and numbers associated with the arcs. For an arbitrary G, a lower bound is established on the total wire length. If G is a rooted tree, an algorithm is presented which requires O(n log n) operations. (Modified author abstract)