slicing lists

[Yves Dorfsman]

castironpi at gmail.com wrote:

> The only thing is, is there is another natural meaning to [a,b:c].
> 
> Counting grids on the diagonals, the rational set is well defined:
> 
> 0: 0, 0
> 1: 1, 0
> 2: 0, 1
> 3: 2, 0
> 4: 1, 1
> 5: 0, 2
> 6: 3, 0
> 7: 2, 1
> ...
> 
> Thencefore ( 2, 0 ) : ( 3, 0 ) is well defined.  Thencefore,
> 
> a,b:c,d
> 
> is not; x[a,b:c,d]= x[a]+ x[b:c]+ x[d].

I'm not sure what you mean here. Could you give me a simple piece of code to 
show an example ?


Yves.
http://www.SollerS.ca