Ralf Hemmecke <[EMAIL PROTECTED]> writes:

> But don't you want to loop over the Generator that is returned by
> structures(s)? 

I can loop on the command line using

S ==> MySpecies
s: Partial S := partialNext! g;
while not failed? s repeat (dosomethingwith retract s; s:= partialNext! g;)

> Why else would one want the function "structures" to return a
> Generator? If you want to access a particular species, there should be another
> function
> 
> nthStructure: (SetSpecies L, Integer) -> %
> 
> (which is something like "unrank").

No, I want a real unrank function! But that will be a lot of work I guess -
although we should provide a default at first in CombinatorialSpecie and
IsomorphismTypeCategory.

Martin


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