Gazi University Journal of Science, cilt.37, sa.2, ss.924-937, 2024 (ESCI)
Main results: The system of Christoffel symbols of the connection of an immersion ξ:J→Rn of an n-dimensional manifold J in the n-dimensional linear space Rn is a system of generators of the differential field of all Aff(n)-invariant differential rational functions of ξ, where Aff(n) is the group of all affine transformations of Rn. A similar result have obtained for the subgroup SAff(n) of Aff(n) generated by all unimodular linear transformations and parallel translations of Rn. Rigidity and uniqueness theorems for immersions ξ:J→Rn in geometries of groups Aff(n) and SAff(n) were obtained. These theorems are given in terms of the affine connection and the volume form of immersions.