[Numpy-discussion] [Python-3000] PEP 31XX: A Type Hierarchy for Numbers (and other algebraic entities)

[Alan Isaac]

On Fri, 27 Apr 2007, Jeffrey Yasskin wrote: 
> Then again, doubles aren't a group either because of this 
> imprecision, and I'm suggesting claiming they're 
> a subclass of that, so maybe there's room in a practical 
> language to make them a subclass of the rationals too. 

Would using language from the Scheme report be useful when 
discussing this?
http://www-swiss.ai.mit.edu/projects/scheme/documentation/scheme_5.html

Cheers,
Alan Isaac