Hi Julian, On 2013-09-16, Julian Rüth <julian.ru...@fsfe.org> wrote: > True, and anything else would be extremely confusing. However, this is > the actual problem with Fields.ElementMethods.is_unit(): RingElement > defines is_unit(), so if an element inherits from RingElement it will > never use that method.
Sadly yes. > Or is there a scenario where the parent of a > RingElement is not in Rings()? The parent of RingElement can be *anything*, the type or the category of the parent is not tested when an element is created. But at least it is the case that any sage.rings.ring.Ring instance is in Rings()---provided that its __init__() is called. Sadly, there are some classes that don't call __init__() of their base classes, IIRC. Best regards, Simon -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/groups/opt_out.
