law of conservation

[Ninduk <fame@citechco.net>]

Mr. Hugh Logan wrote:

> In the first place, what do you mean by the total energy of the
> universe?

i refer to Hawking in brief history "the TOTAL ENERGY of the universe is exactly zero"-p.136.

> In particular, how do you sum the infinitesimal contributions over the entire universe?

may i ask where do all these infinitesimal components come from? if these are of quantum mechanical origin then we can safely disregard
the component because there is an allowed uncertainty of delE for a very small time delT such that delE*delT~h.another point should be
cleared that if stress-energy tensor in GR is conserved as T^jk ;j=o so why it should not hold for everywhere in the universe? as in
tensor we know that if any tensor vanishes in any coordinate system, so does it in every coordinate system.

> How would this be possible if energy is lost by the universe? The only
> thing like creation of matter out of nothing that I have heard of is the
> continuous creation theory of Bondi,Gold and Hoyle in which particles
> are spontanously created so as to keep the particle density of the
> universe constant.

yes, they had devised a so-called c-field theory of such kind.

>