From: MoeBlee on
Peter Olcott wrote:
> "MoeBlee" <jazzmobe(a)hotmail.com> wrote in message
> news:1161126035.398008.237140(a)i3g2000cwc.googlegroups.com...
> > Peter Olcott wrote:
> >> The conclusion that a universal halt detector can not be constructed is
> >> incorrect. The proofs do not show that a universal halt-detector can not be
> >> constructed. The proofs only show that a universal halt-detector can not
> >> provide
> >> the results of its analysis in the case of malignant self-reference where the
> >> caller uses the results to change the outcome of the analysis.
> >
> > The proof is of a mathematical theorem. Whatever that has to do with a
> > "universal halt detector", I'll leave you to you. Meanwhile, "malignant
> > self-reference" has nothing to do with the mathematical theorem and
> > proof.
> >
> > MoeBlee
> >
>
> The "Halting Problem" is about "Halting". The mathematics is an attempt to
> create a mathematical formalism that corresponds to the concept of halting.

The halting of a Turing machine, which is not a physical computer, but
rather is a mathematical object.

MoeBlee

From: Peter Olcott on

"MoeBlee" <jazzmobe(a)hotmail.com> wrote in message
news:1161126868.246164.277940(a)e3g2000cwe.googlegroups.com...
> Peter Olcott wrote:
>> "MoeBlee" <jazzmobe(a)hotmail.com> wrote in message
>> news:1161126035.398008.237140(a)i3g2000cwc.googlegroups.com...
>> > Peter Olcott wrote:
>> >> The conclusion that a universal halt detector can not be constructed is
>> >> incorrect. The proofs do not show that a universal halt-detector can not
>> >> be
>> >> constructed. The proofs only show that a universal halt-detector can not
>> >> provide
>> >> the results of its analysis in the case of malignant self-reference where
>> >> the
>> >> caller uses the results to change the outcome of the analysis.
>> >
>> > The proof is of a mathematical theorem. Whatever that has to do with a
>> > "universal halt detector", I'll leave you to you. Meanwhile, "malignant
>> > self-reference" has nothing to do with the mathematical theorem and
>> > proof.
>> >
>> > MoeBlee
>> >
>>
>> The "Halting Problem" is about "Halting". The mathematics is an attempt to
>> create a mathematical formalism that corresponds to the concept of halting.
>
> The halting of a Turing machine, which is not a physical computer, but
> rather is a mathematical object.
>
> MoeBlee
>
A mathematical abstraction that could be represented as an actual physical
device.


From: Patricia Shanahan on
MoeBlee wrote:
> Peter Olcott wrote:
>> The conclusion that a universal halt detector can not be constructed is
>> incorrect. The proofs do not show that a universal halt-detector can not be
>> constructed. The proofs only show that a universal halt-detector can not provide
>> the results of its analysis in the case of malignant self-reference where the
>> caller uses the results to change the outcome of the analysis.
>
> The proof is of a mathematical theorem. Whatever that has to do with a
> "universal halt detector", I'll leave you to you. Meanwhile, "malignant
> self-reference" has nothing to do with the mathematical theorem and
> proof.

"Malignant self-reference" is also, as far as I know, undefined in
computer science.

Patricia
From: Peter Olcott on

"Patricia Shanahan" <pats(a)acm.org> wrote in message
news:zGdZg.15330$UG4.11773(a)newsread2.news.pas.earthlink.net...
> MoeBlee wrote:
>> Peter Olcott wrote:
>>> The conclusion that a universal halt detector can not be constructed is
>>> incorrect. The proofs do not show that a universal halt-detector can not be
>>> constructed. The proofs only show that a universal halt-detector can not
>>> provide
>>> the results of its analysis in the case of malignant self-reference where
>>> the
>>> caller uses the results to change the outcome of the analysis.
>>
>> The proof is of a mathematical theorem. Whatever that has to do with a
>> "universal halt detector", I'll leave you to you. Meanwhile, "malignant
>> self-reference" has nothing to do with the mathematical theorem and
>> proof.
>
> "Malignant self-reference" is also, as far as I know, undefined in
> computer science.
>
> Patricia

Malignant self-reference is the term that one of the respondents on this group
provided for the self-reference in the halting problem. It is malignant in the
sense that it is self-modifying program, that modifies itself in such a way as
to prevent itself from functioning correctly.


From: MoeBlee on
Peter Olcott wrote:
> A mathematical abstraction that could be represented as an actual physical
> device.

Approximations by a physical device. No physical object is a Turing
machine. A Turing machine is a mathematical object.

MoeBlee