Li. Sedov, PROPERTIES OF THE INVARIANT COMPONENTS OF THE WEYL TENSOR IMPLIED BY THE BIANCHI IDENTITIES, Journal of applied mathematics and mechanics, 58(2), 1994, pp. 189-195
For vacuum regions in pseudo-Riemannian spaces in finite or infinitely
large volumes of four-dimensional spaces, the Riemann tensor becomes
the Weyl tensor. Bawd on the conditions of continuity for the space ge
ometry, the form of the invariant components of the Weyl tensor, as fu
nctions of the coordinate arguments in the Fermi variables on canonica
l global time coordinate curves, is determined With reference to a com
plete system of independent canonical invariants of the different type
s of Weyl tensor in four-dimensional spaces, the conditions of continu
ity are used to determine the form of these invariants as functions of
the comoving individual Fermi coordinates at points of the pseudo-Rie
mannian spaces.