TWMS JOURNAL OF PURE AND APPLIED MATHEMATICS, cilt.6, sa.2, ss.238-245, 2015 (SCI-Expanded)
Let G = SAf f (n, R) be the group of all transformations in R-n as F (x) = gx + b such that g is an element of SL(n, R) and b is an element of R-n The system of generators for the differential algebra of all G-invariant differential polynomials of a pair of curves is found for the group SAf f (n, R). The conditions for G-equivalence of a pair of curves is obtained.