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- Newsgroups: comp.compression.research
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!sample.eng.ohio-state.edu!purdue!decwrl!adobe!wtyler
- From: wtyler@adobe.com (William Tyler)
- Subject: Re: C source for Fractal compression, huh !
- Message-ID: <1992Nov21.000615.22274@adobe.com>
- Followup-To: comp.compression.research
- Sender: Bill Tyler
- Organization: Adobe Systems Inc., Mountain View, CA
- References: <1992Nov18.024912.24072@maths.tcd.ie> <1992Nov18.083335.18739@adobe.com> <1992Nov20.033432.18247@maths.tcd.ie>
- Date: Sat, 21 Nov 1992 00:06:15 GMT
- Lines: 15
-
- In article <1992Nov20.033432.18247@maths.tcd.ie> tim@maths.tcd.ie (Timothy Murphy) writes:
-
- >The informational content H(s) of a string
- >is the length of the shortest program
- >which will output the string
- >when fed into the universal Turing machine U.
-
- I.e. H(s) is only well-defined when you have selected U. For any
- string s, it is possible to construct a universal Turing machine U(s)
- that will output s given the one-symbol input program '0'. If you'll
- let me have a machine that will 'execute' an empty input tape, you
- don't even need the one-symbol program.
-
- --
- Bill Tyler wtyler@adobe.com
-