This note summarizes the important calculations that lead to the classical force law for orbital precession. The calculation is done in two entirely different ways, giving the same result. The lagrangian method is very elegant and simple, and starts from eq. (22). The kinematic method is more complicated but gives the same result. These important calculations mean that:
1) Orbital precession can be explained classically and cannot be used as a test for general relativity.
2) The correct force law is a sum of inverse square and cubed terms in r. The force law of general relativity of the Einstein type is incorrect, it gives a sum of inverse square and fourth terms using the same lagrangian method. There are several big mistakes in Einsteinian general relativity (EGR) and this is one of the worst ones. The EGR theory is complete nonsense for this reason alone.
The same force law is true for any conical section, so is true also for gravitational deflection. For the hyperbola the eccentricity epsilon is greater than unity, and as Horst Eckardt showed graphically yesterday, the conical section can be made into a circle by varying x. If the photon has mass m light deflection due to gravitation is governed by the same conical section and the same force law.