Polygons and iteratively regularizing affine transformations

We start with a generic planar n-gon Q0 with veritices qj,0 (j=0,…,n−1) and fixed reals u,v,w∈R with u+v+w=1. We iteratively define n-gons Qk of generation k∈N with vertices qj,k (j=0,…,n−1) via qj,k:=u qj,k−1+v qj+1,k−1+w qj+2,k−1. We are able to show that this affine iteration process for general input data generally regularizes the polygons in the following sense: There is a series of affine mappings βk such that the sums Δk of the squared distances between the vertices of βk(Qk) and the respective vertices of a given regular prototype polygon P form a null series for k⟶∞.