home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky sci.physics:21206 sci.math:16953
- Path: sparky!uunet!think.com!news!columbus
- From: columbus@strident.think.com (Michael Weiss)
- Newsgroups: sci.physics,sci.math
- Subject: Re: Chaitin's Omega and QM (was: Bayes' theorem and QM)
- Date: 15 Dec 92 10:20:22
- Organization: Thinking Machines Corporation, Cambridge MA, USA
- Lines: 34
- Message-ID: <COLUMBUS.92Dec15102022@strident.think.com>
- References: <1gh518INN9eo@chnews.intel.com>
- <SRCTRAN.92Dec14122532@world.std.com>
- <COLUMBUS.92Dec14142145@strident.think.com>
- <1992Dec14.223229.22348@galois.mit.edu>
- NNTP-Posting-Host: strident.think.com
- In-reply-to: jbaez@riesz.mit.edu's message of Mon, 14 Dec 92 22:32:29 GMT
-
- In article <1992Dec14.223229.22348@galois.mit.edu> jbaez@riesz.mit.edu
- (John C. Baez) writes:
-
- I quote DeMers:
-
- For Kolmogorov Complexity in general, the best place to
- start would be with
- an introduction to the notions of Kolmogorov Complexity and
- its application to a number of different problems which can
- be found in:
-
- Li, M. and Paul Vitanyi, Kolmogorov Complexity and Its
- Applications, in
- Handbook of Theoretical Computer Science, (J. van Leeuwen, Ed.)
- North-Holland, 1989.
-
- I might add that Li and Vitanyi do a meticulous job recounting the history
- of the subject (about as tangled as usual). If you want to know who proved
- what when, this is the place to look. Besides Solomonoff, Kolmorgorov,
- Chaitin, and Martin-Loef, already mentioned in this thread, Leonid Levin,
- Peter Gacs, and Robert Solovay also made important contributions.
-
- According to Li and Vitanyi, priority for the concept of algorithmic
- entropy (or information) should go to Solomonoff, with independent
- rediscovery by Kolmorgorov and by Chaitin. Somewhat ironically they use
- the term Kolmogorov complexity throughout! (I used the term
- Chaitin entropy in my last post.) Probably the best term is "algorithmic
- entropy" or "algorithmic information content", which Zurek uses.
-
- Oh well. The cubic formula was discovered by Scipio del Ferro,
- independently rediscovered by Tartaglia, and first published by Cardano who
- gave credit to Tartaglia (I don't remember if he also credited del Ferro).
- So of course it is almost universally referred to as Cardano's formula.
- (Look up the history of L'Hospital's rule sometime...)
-