
Dear Marina
I have followed the book of Dr. Shipov entitled «A Theory of Physical Vacuum», which he had kindly sent me.
Dr. Shipov has generalized the ordinary fourdimensional Relativity Theory. He showed that the righthand sides of the Einstein field equations for gravity and the equations of generalrelativistic electrodynamics can be geometrized successfully, if one uses not a Riemannian geometry but the geometry of absolute parallelism. The new field equations he suggests were written as
(1) 
where ν is a constant, and the energymomentum tensor is geometric and given by
(2) 
(3) 
One then finds that the equations (1) are the Einstein's equations if one assumes that ν=8πG/c^{4}, or to the equations of generalrelativistic electrodynamics if one assumes that ν=8πe/mc^{4}. As can be seen, the constant ν in the generalized field equations (1) will be canceled out if one substitutes the energymomentum tensor (2) into equations (1). Accordingly, the generalized field equations (1) contain no physical constants. This is, of course, the usual procedure of geometrization of the energymomentum tensor and its constituent fields. We have not included in the above very brief description of Dr. Shipov's theory all the important details, and one should refer to his book for extensive details which seem to be of high interest.
I find the work of Dr. Shipov quite original and creative. His ideas about «Universal Relativity» and «Physics Vacuum» are greatly interesting, and are excellently developed by him to a theory, which seem as a continuation of Einstein's work.
I wish Dr. Shipov a lot of success in his work.
Sincerely yours,
Moshe Carmeli