International Journal of Mathematics and Mathematical Sciences
Volume 2003 (2003), Issue 14, Pages 895-902
doi:10.1155/S0161171203104012
Abstract
We present powerful recurrence relations of the second and third
kind which hold in 7-dimensional Einstein's generalized
Riemannian manifold X7. All considerations in this paper are
restricted to the first and second classes of X7 only since
the case of the third class, the simplest case, was already
studied by many authors.