s-Consensus trees and indices

In the field of numerical taxonomy it is often desirable to determine a tree which is the consensus (common part) of severaln-trees, each of which represents a classification of the same set of objects. In this note, ans-consensus tree and corresponding consensus index for a collection ofn-trees are defined. The choice of a value for the parameters will determine the number of nodes in thes-consensus tree and its tendency to resemble the strict or Adams-consensus tree.