On 10/01/2011 03:59 PM, scott wrote:
>> Mathematical theories exist independent of the physical world. For
>> example, the Manhattan geometry surely doesn't describe any real-world
>> situation (except something really abstract like network topology).
>
> Err, you do realise why it's called Manhattan geometry?

Because it applies to the topology of the streets of Manhattan?

Like I said, I'm sure there's lots of other, similarly abstract things 
to which it also applies. It does /not/ however apply literally to the 
three-dimensional space that we all see around us.

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