Re: Pari Bug?

["Prof. J. E. Cremona" <John.Cremona@nottingham.ac.uk>]

It is very likely that elllseries only gives correct answers with a 
global minimal model.  This is true, though not always documented, with 
several of Pari's elliptic curve functions.  In your case your curve [0, 
55, 3025, -121000, 34439625] is nonminimal at 11, as I am sure you know.

So you will ask -- why does elllsseries not switch to a minimal model 
itself?  I suppose the answer is that this would only waste time when 
the curve was minimal already.  A solution would be to do this unless 
the user has set a switch/flag to say "don't bother minimising this 
model as I already know that it is minimal".

John Cremona

--
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