Peter Forrest (1995) presents another solution. He starts by introducing a family of discrete spaces \(E_{n,m}\), where \(n\) corresponds to the “classical” dimension of space and \(m\) is a scale factor, to be understood as follows: \(m\) is a parameter to decide when two points are or are not adjacent, which is the basic (and sole) concept of his geometry. Thus in the case \(n = 2\), points are labeled by couples of integers \((i,j)\) and two points \((i, j)\) and \((i', j')\) are adjacent if they are distinct, and \((i-i')^{2} + (j-j') ^{2} \le m^{2}\).