From: mrmuon@next08pg2.wam.umd.edu (Eli John Hawkins)
Subject: Re: The Valyard & Time Travel-rewrite
Organization: Workstations at Maryland, University of Maryland, College Park
Distribution: na
Date: Sat, 25 Jul 1992 00:48:25 GMT

In article <1992Jul24.190626.22596@nmsu.edu> bgrubb@nmsu.edu (GRUBB)  
writes:
> Time Travel is possible.  Several ideas derived out of BOTH Einstein
> theories and quantum suggest our old consept of ONE dimesion of time is
> WRONG.  First there is the little know constant in Einstein equations;
> this constant implies MORE THEN ONE UNIVERSE to exist (Einstein removed
> and replaced this constant within the equations because of this; the
> equations WITH the constant have been proven not the others.)  Second,
    I'm pretty sure your referring to the cosmological constant. That has  
nothing to do with coexistant alternative universes. It wasn't in the  
original form of general relativity, but the original form turned out to  
predict that the universe would expand. As far as Einstein knew It didn't,  
so he modified the theory by adding the cosmological constant to stablize  
the universe. Later it turned out that the Universe is expanding, so  
Einstein removed the constant, calling it his greatest mistake.
> the wormhole effect suggested for black holes (all using Einstein
> equations) says that "time and space are transposed beyond the event
> horizon of a black hole"  i.e. you gain ALL the freedom in TIME that
> you had in SPACE as well as the reverse.  Since you only had one
> direction of freedom in time outside the event horizon you now only one
> direction of freedom in space inside the hole AND by QED --Since you
> had THREE directions of freedom in space outside the event horizon you
> now have THREE directions of freedom in TIME inside the hole.--(The
> author fails to mention this little result of switching the axis of the
> time-space grid.[The book in question is called "Wormhole in Time and  
space"
> ,I believe- it has a star with a trail of steral material being pulled  
into
> a grid-like cone(the black hole]  I can give the proper title by  
September
> when my stuff comes from Ohio)  [It has been pointed out that the  
constant 
> was mainly for a static universe but it also works in CLOSED universes
> not in an open one. Also "If a black hole is rotating {two event  
horizons}
> one can miss the singularity and emerge in another TIME and place in  
this
> universe [wormholes] or in ANOTHER one [EINSTEIN-Rosen bridges]" (Pg 185
> "The dancing Wu Li Masters" by Gary Zukav)
   Please don't trust "the Dancing Wu Li Masters" so much.
   
   All directions (velocities) in space time are either Time-like,  
space-like, or null. These are arranged in a diagram called the light  
cone. The null directions form a (double) cone, the time-like directions  
are inside the cone, and the space like directions are outside the cone.  
Note that the time-like directions are devided into 2 seperate sets inside  
the two halves of the cone; these are future-pointing and past-pointing  
time-like directions. Material objects always travel with time-like  
velocities. Our velocities are all future-pointing, it is impossible to  
continuously transform a future-pointing velocity into a past pointing  
velocity because the two sets are disconnected, unless you pass through  
some sort of space time structure that exchanges them.
   Inside the event horizon of a black hole the light cone gets tipped  
over. The direction that was time becomes space-like, and the radial  
direction, which was space-like, becomes time-like. The time-like  
directions are still on the inside of the light cone, so time is still one  
dimensional, and space is still 3 dimensional.