1.36: Domain of influence
The domain of influence of a lattice point P (Delaunay 1933), or Dirichlet domain or Voronoi domain, consists of all points Q in space that are closer to this lattice point than to any other lattice point or at most equidistant to it, namely such that OP ≤| t - OP | for any vector t belonging to the vector lattice L . It is the inside of the Wigner-Seitz cell.