A. Larilavassani, A TANGENT-SPACE CHARACTERIZATION OF THE EQUIVALENCE OF GERMS FOR GEOMETRIC SUBGROUPS OF A AND K, Proceedings of the Royal Society of Edinburgh. Section A. Mathematics, 125, 1995, pp. 587-593
It is shown that under the action of a geometric subgroup G of A and K
, for a germ f satisfying a certain finiteness condition, given a germ
p, if the tangent spaces of f and f + p are equal for all t is an ele
ment of [0, 1], then f and f + p are G-equivalent.