On Sunday, June 14, 2015 at 7:41:32 AM UTC-7, Nathann Cohen wrote:
>
> > CHomP gets used by Sage if the system detects its presence. And then it
> > leads to doctest errors.
>
> It should not: do you have an example of that? Only new-style optional
> packages should be automatically added to "--optional=...", and chomp
> is not a new-style package.
>
It's not a matter of an optional doctest flag. The Sage code says (in
cell_complex.py)
if isinstance(self, CubicalComplex):
if have_chomp('homcubes'):
H = homcubes(self, subcomplex, **kwds)
elif isinstance(self, SimplicialComplex):
if have_chomp('homsimpl'):
H = homsimpl(self, subcomplex, **kwds)
So if you are computing the homology of a simplicial complex and Sage can
find the CHomP executable homsimpl, it runs it to compute the homology. See
#16364 for doctest errors related to CHomP.
--
John
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