  If the Universe is closed, there must exist a constant and positive energy
density of vacuum (cosmological constant). By analyzing the McVittie metric, we
show that in the expanding Universe: the Hubble parameters at the event
horizons of all centrally symmetric black holes are equal and related to the
cosmological constant, black holes do not grow with the expansion of the
Universe, and different regions of the Universe expand at different rates
(Hubble tension).
