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Topic: Infinity: The Story So Far
Replies: 5   Last Post: Feb 28, 2014 10:20 AM

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fom

Posts: 1,968
Registered: 12/4/12
Re: Infinity: The Story So Far
Posted: Feb 28, 2014 8:01 AM
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On 2/28/2014 2:01 AM, mueckenh@rz.fh-augsburg.de wrote:
> On Thursday, 27 February 2014 22:52:54 UTC+1, fom wrote:
>

>>> The question was whether Peano defines the natural numbers. He fails.
>>
>>
>>
>> Why do you say that?
>>

>
> I say that because it is widely assumed that Peano defined the natural numbers. People assume the natural numbers and find that Peano is rigth. But the other way dos not work. Assuming the Peano axioms does not yield N. I emphasize this because it has been hundred years taught falsely.

>>
>>
>> It would be correct to say that he assumes the
>>
>> natural numbers and places identity criteria
>>
>> onto his denotations to restrict their
>>
>> interpretations. In that sense he does not
>>
>> define them. But I do not think this is what
>>
>> you mean.

>
> It is precisely what I mean. And I am in particular happy that there are some like you who have not yet been completely perverted by the study of mathematics but can understand that some topics have been taught wrong.
>


Ok. Yes, Peano's actual axioms are different
from the recharacterizations according to the
needs of computer systems or the first-order
axioms.

Thanks.






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