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- From: crb7q@kelvin.seas.Virginia.EDU (Cameron Randale Bass)
- Newsgroups: sci.physics
- Subject: Re: GR with no Einstein? (Was: Re: No big crunch?)
- Message-ID: <1992Nov7.034056.1944@murdoch.acc.Virginia.EDU>
- Date: 7 Nov 92 03:40:56 GMT
- References: <1dco23INNh7j@agate.berkeley.edu> <1992Nov6.042306.899@murdoch.acc.Virginia.EDU> <1992Nov6.232435.15628@galois.mit.edu>
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- Organization: University of Virginia
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- In article <1992Nov6.232435.15628@galois.mit.edu> jbaez@riesz.mit.edu (John C. Baez) writes:
- >In article <1992Nov6.042306.899@murdoch.acc.Virginia.EDU> crb7q@kelvin.seas.Virginia.EDU (Cameron Randale Bass) writes:
- >
- >> Suppose, as I have been, that you *don't even have* GR.
- >> In 1906, there was no certainty that GR would be developed.
- >> In fact, if Einstein had died in 1906, I'm quite sure it
- >> wouldn't have been.
- >
- >Oh good, let's argue about this, since it is utterly contrafactual. I'm
- >sure GR would have been developed (though not in 1906!). Einstein was
- >not the only person working on trying to come up with relavistic
- >theories of gravity. Other people came up with some that were getting
- >sort of close (sorry, I don't have references on this - it would be fun
- >to know just *how* close). And more importantly, the mathematical
- >infrastructure had already been laid by Riemann and was being studied by
- >Cartan and Hilbert, who were sort of into physics. So I am quite sure
- >someone would have come up with GR after a while.
-
- Riemann's attempts were widely considered to be failures. It
- is my contention that Einstein was fairly lucky to have been able
- to study Riemann before 1900. A priori there is no reason to believe
- that riemannian geometry will be useful in that context at all.
-
- And Cartan himself once bemoaned to Einstein that he did not have
- the physical background to pursue various physical subjects. I hardly
- think this is promising grounds for an Einsteinless GR.
-
- It is also true that the fact Einstein was working on the problem
- provided some of the impetus in the 1910's for such work. However, the
- fact that GR was basically roundly ignored from 1917 until the early 60's
- lends credence to the basic assertion that GR without Einstein would
- have not been certain. Even nearly 70 years later, however, the number
- of errors and contradictions in GR literature is astounding (Damour, In
- "300 Years of Gravitation" Cambridge (1987)). It is an extremely
- difficult and complex formulation, a priori, and I feel that without
- Einstein's rather prodigious physical insight, it would still lie
- undiscovered.
-
- I don't think I'm alone in this. Maybe we should ask John Wheeler
- to speculate?
-
- dale bass
-
-
-
- --
- C. R. Bass crb7q@virginia.edu
- Department of Mechanical,
- Aerospace and Nuclear Engineering
- University of Virginia (804) 924-7926
-