id summary reporter owner description type status priority milestone component resolution keywords cc merged author reviewer upstream work_issues branch commit dependencies stopgaps
13184 Some Homset are not unique parents Xavier Caruso Nicolas M. Thiéry "I guess it is a bug:
{{{
sage: k = GF(5)
sage: H = Hom(k,k)
sage: H2 = Hom(k,k)
sage: H is H2
False
}}}
I don't know what is the correct way to fix this problem.
More precisely, in sage.categories.homset (l. 223-227), one can read:
{{{
try:
# Apparently X._Hom_ is supposed to be cached
return X._Hom_(Y, category)
except (AttributeError, TypeError):
pass
}}}
However, in this particular case, k._Hom_ is apparently not cached. IMHO, caching should be the job of sage.categories.homset.Hom is all cases, but I might be wrong.
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1. [attachment:trac_13184_sage_5.9.beta.patch]" defect closed major sage-5.10 categories fixed homset unique parent Xavier Caruso Simon King Nils Bruin sage-5.10.beta0 Xavier Caruso, Frédéric Chapoton Travis Scrimshaw N/A #14159