Complete systems of differential invariants of vector fields in a euclidean space

Authors: DJAVVAT KHADJIEV

Abstract: The system of generators of the differential field of all G-invariant differential rational functions of a vector field in the n-dimensional Euclidean space R^n is described for groups G=M(n) and G=SM(n), where M(n) is the group of all isometries of R^n and SM(n) is the group of all euclidean motions of R^n. Using these results, vector field analogues of the first part of the Bonnet theorem for groups Aff(n), M(n), SM(n) in R^n are obtained, where Aff(n) is the group of all affine transformations of R^n. These analogues are given in terms of the first fundamental form and Christoffel symbols of a vector field.

Keywords: Vector field; Christoffel symbol; Bonnet theorem; Differential invariant

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