Bilet, V.V.; Dovgoshey, O.A.(Доповіді НАН України, 2017)
A new sequential approach to investigations of the structure of metric spaces at infinity is proposed. Criteria for
the finiteness and boundedness of metric spaces at infinity are found.
We investigate tangent spaces and metric space valued derivatives at points of a general metric spaces. The conditions under which two different subspaces of the metric space have isometric tangent spaces in the common ...