On canonical first-type almost geodesic mappings of affinely connected spaces that preserve the Riemann tensor

In this paper, we obtain general equations for canonical first-type almost geodesic mappings of affinely connected spaces under which the Riemann tensor is preserved. These equations are reduced to a closed system of Cauchy-type equations in covariant derivatives. The number of essential parameters on which the general solution of the resulting system of equations depends is established. A particular case of such mappings is considered and examples of almost geodesic mappings of the first type of flat space onto flat space are given.