The Similarity Theory of Relativity and the Dirac-Schrödinger Theory of Electrons

The similarity theory of relativity is shown to contain the recent Dirac-Schrödinger theory of electrons as a special case. The variational principle is built on the curvature scalar formed from the basic symmetric similarity tensor $S_{\sigma \tau }$, and leads to a unified field theory of the gravitational field, the electromagnetic field, a scalar field of the sort used by Jordan in his theory of the variable gravitational constant, a charged scalar particle field, and a vector particle field.