Indeed, the failure for binary trees should come from canonical labeling. 
It would be enough to
change the doctest so that they are no longer sensitive to that.

I am no longer that sure that TOPCOM is the other problem. What other 
package is delaing with homology ? chomp ?

Frederic

Le dimanche 14 juin 2015 10:09:23 UTC+2, Nathann Cohen a écrit :
>
> > I would suspect that topcom should be responsible for the homology 
> errors. 
> > 
> > No idea for what happens to binary trees. They seem to be reversed 
> (left-right symmetry ?) 
>
> That could be 'bliss'. It becomes the default algorithm to compute 
> automorphism groups of graphs and canonical representatives. Those 
> canonical representatives will be different from the previous ones, 
> though. 
>
> Nathann 
>

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