The Volume on Advances in Steiner Trees is divided into two sections.
The first section of the book includes papers on the general geometric
Steiner tree problem in the plane and higher dimensions. The second
section of the book includes papers on the Steiner problem on graphs.
The general geometric Steiner tree problem assumes that you have a given
set of points in some d-dimensional space and you wish to connect the
given points with the shortest network possible. The given set ofpoints
are 3 Figure 1: Euclidean Steiner Problem in E usually referred to as
terminals and the set ofpoints that may be added to reduce the overall
length of the network are referred to as Steiner points. What makes the
problem difficult is that we do not know a priori the location and
cardinality ofthe number ofSteiner points. Thus)the problem on the
Euclidean metric is not known to be in NP and has not been shown to be
NP-Complete. It is thus a very difficult NP-Hard problem.