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Using our -series, and in fact using any -series one can define the notion of a function that is very similar to , except that it has more symmetries. It is defined as follows:
Where is the conductor of the curve and is the complete function evaluated at .
However, when only considering those -series that come from elliptic curves the associated -series obeys the following symmetry:
where
is the root number of (which can be found using ellrootno in PARI). Because of this symmetry, the graphs of
can look ``nicer'' then those of and in the graphs below we produce graphs of both and
for this reason.
Ariel Shwayder
2002-12-11