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Hi Georgi, its been me jrc, hogging the bandwidth. I had to get a new cheap laptop that is so overloaded by the OS that I don't use it for anything that requires 'creating an account'. Tough enough to keep a clean machine.
I thought of you while composing the point in argument that we can only assume the rate of passage of time anywhere, is somewhere between nil and light velocity. Einsteins euphemism that 'time stops at light velocity' is provocative but neglects the obvious point that it would only be so in relation to light velocity being the upper limit to the rate of passage of time. But that is all within the very limiting constraints of SR. In GR, temperature can be generalized to higher energy density = higher gravitation = lower temperature = slower passage of time. The challenge is to formalize that at the quantum level, and GR treats a region of constant density as an averaged mass density rather than a proportional mass density.
Condensed Matter Physics, which is by far the largest generic discipline in today's practicing physics community, recognizes this. But yet there remains the conspicuous absence of consensus on a definitive formulation of a particle of condensed energy which meets conventional standards, not least of which would be distribution in accord with inverse square law.