Le 09-mai-05, à 19:39, Brent Meeker a écrit :

In what sense does "the program" exist if not as physical tokens? Is it
enough
that you've thought of the concept? The same "program", i.e. bit-string,
does
different things on different computers. So how can the program instantiate
reality independent of the compu

By the magic of Church thesis, going from one computer to another is just like
making a change of basis in some space. All result in Algorithmic information theory
are independent of the choice of computer modulo some constant. The same
for recursion theory (abstract computer or generalized computer theory) even without constant.


Bruno


http://iridia.ulb.ac.be/~marchal/




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