On 12 Oct 2013, at 04:52, Russell Standish wrote:
On Fri, Oct 11, 2013 at 05:46:57PM -0700, meekerdb wrote:
On 10/11/2013 4:36 PM, Russell Standish wrote:
On Fri, Oct 11, 2013 at 04:08:05PM -0700, meekerdb wrote:
Maybe I'm not clear on what UD* means. I took it to be, at a given
state of the UD, the last bit output by the 1st prog, the last bit
output by the 2nd program,...up to the last prog that the UD has
started. Right?
Its not the output, because the UD doesn't actually output
anything. Rather its an internal view of the states the machines
emulated by the UD pass through, rather like what the Helsinki man
experiences when being duplicated to Moscow and Washington.
Its a subtle point, and I fell into the same trap you did (and Liz
did
also, this morning) a few years ago. I'm not sure anyone has a
clear,
crisp mathematical explanation of what UD* is - I certainly don't.
Even if we have the complete record of everything the UD has done up
to some point I don't see how we can define the kind of measure we
need over that, because the measure has to be over all threads of
computation corresponding to a particular classical state.
And these correspond to a countable union of sets of strings sharing
the same prefix, which is just the Solomonoff-Levin measure.
I think this might play some role in the thermodynamic, but the
quantum and the very existence of physics needs the measure on the
points of view (which I handle with the self-reference logics).
Bruno
--
----------------------------------------------------------------------------
Prof Russell Standish Phone 0425 253119 (mobile)
Principal, High Performance Coders
Visiting Professor of Mathematics hpco...@hpcoders.com.au
University of New South Wales http://www.hpcoders.com.au
----------------------------------------------------------------------------
--
You received this message because you are subscribed to the Google
Groups "Everything List" group.
To unsubscribe from this group and stop receiving emails from it,
send an email to everything-list+unsubscr...@googlegroups.com.
To post to this group, send email to everything-list@googlegroups.com.
Visit this group at http://groups.google.com/group/everything-list.
For more options, visit https://groups.google.com/groups/opt_out.
http://iridia.ulb.ac.be/~marchal/
--
You received this message because you are subscribed to the Google Groups
"Everything List" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to everything-list+unsubscr...@googlegroups.com.
To post to this group, send email to everything-list@googlegroups.com.
Visit this group at http://groups.google.com/group/everything-list.
For more options, visit https://groups.google.com/groups/opt_out.
