A realization of a graph in -dimensional space is obtained from a simple graph
by assigning a point to each vertex of . Each edge of corresponds to a line segment in the realization,
connecting the points of the end-vertices of the edge.
In some cases the edge lengths of the realization determine all pairwise distances, in the sense that
every other realization of with the same edge lengths is a congruent copy.
The goal is to study how this uniqueness property depends on and/or .