Doug wrote:
> 
> Alberto wrote:
> 
>> There are no boundaries if the big U is, spatially, a S3 [*]
>> 
>> [*] the three dimensional surface that can be represented immersed
>> in R4 by the equation x^4 + y^4+ z^4 + w^4 = 1
> 
> Is that translatalbe to Laymanish?
> 
That *was* Laymanish O:-)

Alberto Monteiro

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