  The equations of motion of a test particle are integrated for the field of a
rotating Kerr black hole (BH). Due to the lack of analytical transformations
for the Carter-Penrose diagrams (CPDs) for the Kerr metric, the topology of the
Kerr BH is studied by analytical investigation of the equations of motion.
Transformations for the CPDs for the Reisner-Nordstr\"om metric are analyzed.
The problem of boundary conditions for the Reisner-Nordstr\"om topology is
analyzed. A solution to this problem of boundary conditions is proposed. It is
proved that, in the Reisner-Nordstr\"om topology, only one way to go to another
universe is possible. For the Kerr topology, the possibility of the existence
of an alternative transition to another universe that does not coincide with
the universe for the ordinary transition is found. This alternative transition
is performed through a surface with a zero radial coordinate (zero radius).
Initial conditions for the falling particle are found that correspond to an
alternative transition to another universe. The tidal forces acting on a
falling body in the Kerr metric are estimated, and the possibility of the
transition of the body to other universes without being destroyed by tidal
forces is proved.
