, an in-invariant.[129] We are thus led to the law of gravitation with the
term, that is to say, to the finite universe.
Furthermore, the ideal of unity towards which science tends incessantly, demands that the action be built up from the structural elements of the fundamental continuum. In Einstein’s theory this was impossible, since the electromagnetic potentials (i.e., the
’s) were foreign to the space-time structure. It followed that we were faced with two separate actions, the gravitational action and the electromagnetic one. Weyl’s theory permits us to obtain a unification of these actions, since the electromagnetic potentials, the
’s are now represented by the
