On Monday, August 26, 2019 at 5:22:53 AM UTC-5, Bruno Marchal wrote:
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> On 25 Aug 2019, at 20:10, Philip Thrift <[email protected] <javascript:>> 
> wrote:
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> On Sunday, August 25, 2019 at 12:38:17 PM UTC-5, Brent wrote:
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>> A mathematical structure is a relation between propositions defined by 
>> some rules of deduction.  It is static.  It has no "accidental" or as Bruno 
>> would say "geographic" features. Two mathematical structures can be 
>> isomorphic precisely because of this.  It is impossible that a mathematical 
>> and a physical structure be isomorophic.  That is just a loose way of 
>> talking that assumes we will abstract away enough of the physical structure 
>> so that the remainder can be represented mathematically and then that can 
>> be isomorphic to some other mathematical structure.  
>>
>> Brent
>>
>>
>>
>
> Once one eliminates Platonism and accepts that mathematics is programming 
> <https://codicalist.wordpress.com/2019/08/22/arche-programming/> 
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> If you accept the idea that a machine stops, or does not stop, then 
> 99,9999…% of the mathematical reality, and some percentage of the physical 
> reality, is not programmable. 
>


Every physicist seems to think that their own theory of physics (which they 
have written in TeX/Math) can be written as a program.

Beyond those kind of programs, there are matter compilers after all.

@philipthrift

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> then all of physics (what humans have thought of to model the cosmos) can 
> be found in the numerical relativity and quantum simulation programs 
> running on computers.
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> If I am computable, reality cannot be computable.
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> So a program and a "physical structure" are only isomorphic if the 
> universe itself is a simulation.
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> With mechanism, despite a general misunderstanding, the physical reality 
> is not a simulation, nor is the mathematical reality (even limited to the 
> arithmetical reality). This is already empirically confirmed somehow, by 
> QM, I would say.
>
> Bruno
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>
>

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