“…Let denote the set of all γ ⊂ R d that are locally finite, i.e., such that γ ∩ is a finite set whenever ⊂ R d is compact. Thus, is a configuration space as defined in [1,3,8,11]. In order to take into account the particle's type we use the Cartesian product 2 = × , see [5,7,9], the elements of which are denoted by γ = (γ 0 , γ 1 ).…”