Mach's Principle: the origin of the inertial mass (I)

We show that the forces of inertia acting on the accelerated bodies are forces of gravitational induction exerted by the whole of the Universe. Therefore, the phenomenon of inertia and the inertial mass of a body have a cosmic origin, as demanded by the Mach's principle. The calculations will be applied to a vector gravitational field theory. In a second part of this research we will apply these results to the General Theory of Relativity