On Sat, Feb 21, 2015 at 08:47:40PM +0000, Simon King wrote:
> > How should I fix this?
>
> By providing a starting point for the summation:
> sage: sum([myElement]).parent()
> ModularFormsRing(n=3) over Integer Ring
> sage: myElement.parent()
> ModularForms(n=3, k=4, ep=1) over Integer Ring
> sage: sum([myElement], myElement.parent().zero()).parent()
> ModularForms(n=3, k=4, ep=1) over Integer Ring
Alternatively, you can use the form:
parent.sum(elements)
whose role is precisely to use the zero of the parent just when needed
(that is if the list is empty).
Cheers,
Nicolas
--
Nicolas M. Thiéry "Isil" <nthi...@users.sf.net>
http://Nicolas.Thiery.name/
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