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From: crummer%AEROSPACE@sri-unix.UUCP
Newsgroups: net.physics
Subject: Time machines/Tipler/black holes (long!)
Message-ID: <1174@sri-arpa.UUCP>
Date: Thu, 24-May-84 12:23:12 EDT
Article-I.D.: sri-arpa.1174
Posted: Thu May 24 12:23:12 1984
Date-Received: Fri, 1-Jun-84 03:09:43 EDT
Lines: 17

From:            Charlie Crummer <crummer@AEROSPACE>

Your statements about frames where photons don't move makes me leery of the
rest of your statements.  Of course there is a whole lot of stuff that you
say that requires careful mathematical scrutiny.  Have you really verified
(mathematically) all the things you say?  According to SR and GR the speed
of light is the same for all observers.  What changes is the observed
frequency of the light (Doppler shift).  SR and GR are both based on the 
hypothesis that the Laws of Physics, i.e. the Lagrangian, are invariant under
Lorentz transformations; global ones for SR and local ones varying smoothly
from event to event for GR.  

This stuff is all very delicate and the invariance mentioned above, called
gauge invariance, must be maintained.  It is way too complicated and elegant
to be treated glibly (witness Sarfatti).

  --Charlie