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From: gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>)
Newsgroups: net.misc,net.physics
Subject: Re: perpetual motion
Message-ID: <9437@brl-tgr.ARPA>
Date: Fri, 22-Mar-85 13:03:04 EST
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Posted: Fri Mar 22 13:03:04 1985
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Xref: watmath net.misc:7642 net.physics:2308

> 	Could someone kindly translate the above into English
> 	for those of us who don't often see phrases like
> 	"time translation invariance"
> 		 and
> 	"vanishing divergence of stress-energy-momentum tensor"?

Sorry, that is as simple as you're likely to get.  The first phrase
is self-explanatory; just analyze the words.  The latter requires a
certain degree of familiarity with tensor calculus and general
relativity.

This IS net.physics (info-physics), isn't it?