🚀 go-pugleaf

Jon: Thanks, that is all interesting. But in my opinion:
There is no such thing as "gravitational mass-energy". In dealing with,
eg, binary pulsars etc, it is convenient to TALK that way. But look at
the Einstein equation: where do you put in the contributions of gravity?
Answer: you don't. Sure,you can mangle it around, and get a
gravitational stress-energy thingamajig, and such a procedure may be
useful for calculations...but in the end, it's all just hocus-pocus.
As for the question" what happens to the matter when it reaches r=0?
Answer: nothing. The matter never "reaches" r=0. By this I mean the
following: parametrise the worldline of the particle by proper time.
Then this parameter is defined only on an OPEN interval...that's what
this stupid word "singularity" means. So THERE IS NO SPACETIME EVENT
corresponding to "particle reaches r=0". I am not of course saying that
the particle has an infinite future history: it is finite, but it has no
end, just as the interval (0,1) if finite but has no final element. Thus
the particle has a finite future, but it never reaches r=0. So all this
mystification about what happens when things "go into" the singularity
is totally misplaced.