The range of interaction for a determinantal point
process model may defined as the smallest number \(R\) such that
\(g(r)=1\) for all \(r\ge R\), where \(g\) is the pair
correlation function. For many models the range is infinite, but one
may instead use a value where the pair correlation function is
sufficiently close to 1. For example in the Matern model this defaults
to finding \(R\) such that \(g(R)=0.99\).