P Allan,
It is included in Einstein's General relativity whether you use it today or not. Einstein clearly states that in General Relativity the speed of light is a variable. There's no way around it. The speed of light that we measure from distant galaxies has to come through our gravitational...
P Allan,
You said: 1) The title and content of the paper do not show an equivalence between this proposed theory and general relativity. The title claims an improvement in an early theory of Einstein's (NOT general relativity), and that is what the content of the paper actually shows. The...
In his book (Relativity) published in 1920 Einstein said that in General Relativity the speed of light is affected by gravity and therefore isn't a constant:
In the second place our result shows that, according to the general theory of relativity, the law of the constancy of the velocity of...