Multipoint invariants of transformation groups, and three-web defined by them (Q2387054)

In their paper [``Three-webs determined by transformation groups'', Dokl. Akad. Nauk 385, No. 4, 462--464 (2002)] the authors proved that the core of a web defined by a transformation group is an equality between two invariants of the group. In this paper they find point invariants of the affine group \(A_p\), as well as of the group \(P_p\) of projective transformations. They also find the cores of three-webs determined by these groups.