Remarks on the Wilson-Zimmermann expansion and some properties of them-point distribution

This paper contains a few simple remarks on a paper by S. Schlieder and E. Seiler. For the special class of local fields treated by these authors we arrive at the same necessary condition for the existence of the Wilson-Zimmermann expansion (considered both as an operator expansion and as an expansion in bilinear forms) of the product ofn real scalar fields under the assumption that the singularities occurring asxj→xj+1;j=1, 2, ...,n−1, do not influence each other as long as these limits are simultaneously taken.