🚀 go-pugleaf

srctran@world.std.com (Gregory Aharonian) says:

> March 28, 1992 issue of New Scientist, page 23, has an interesting
> article reviewing an article in Physical Review D (October 1991) in which
> David Deutsch of Oxford uses the many-worlds hypothesis to show how one can
> how time travel without the paradoxes of killing your grandfather.  He
> argues that if you could travel back in time, you would end in a parallel
> universe, whose future you could affect, without affecting your own future.
> Interesting articles.

You might look at this article, by Igor Novikov (now at the Copenhagen
University Observatory):

THE JINN OF THE TIME MACHINE: NONTRIVIAL SELFCONSISTENT SOLUTIONS.
By A. Lossev, I.D. Novikov (Nordita & Moscow, ITEP & Lebedev Inst.), 1991.
NORDITA Copenhagen - NORDITA-91-41 (91,rec.Oct.) 20 p. (submitted to
Class. Quantum Grav.).

I haven't read it, but I heard him give a talk with that title.  He argues
that the lack of 'grandfather paradoxes' might just be a boundary condition
that is automatically satisfied.  I don't recall that he discussed any
specific mechanisms which might enforce this.