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In 2011, Jun Ni published the solution of the Tolman-Oppenheimer-Volkoff equations describing the structure of stable neutron stars, which implies that 1) there is no upper mass limit of these objects, 2) their outer physical surface is always situated above the corresponding event horizon, and 3) the object is a hollow sphere with the inner physical surface and cavity inside. In our paper, we propose to "purify" the general relativity, as the geometrical theory, from the concept of mass. If wedoi:10.4236/jmp.2015.615220 fatcat:jiv2w23oorbitmha5semew2fxa