Advances in Applied Clifford Algebras, vol.26, no.2, pp.645-668, 2016 (SCI-Expanded)
Let E12 be the real 2-dimensional pseudo-Euclidean space of index 1, O(1; 1) be the group of all pseudo-orthogonal transformations of E12 and SO(1; 1) = {g ∈ O(1; 1) : det g = 1}. In the present paper, complete systems of invariants of m-tuples in E12 for these groups and complete systems of relations between elements of the complete systems of invariants are obtained. For solutions of the these problems, hyperbolic numbers are used.