On Wed, Mar 25, 2009 at 11:26 AM, Henryk Trappmann
<bo198...@googlemail.com> wrote:
>
> Oh, then I have some questions.
>
> First how shall the class finally be named (the current name
> PowerSeriesI is rather a working title):
> LazyPowerSeries (conflict with Mike Hansen's package),
> InfinitePowerSeries, LIPS?
(1) CamelCase is good for class names
(2) It isn't a problem to use the same name as a class in another file
-- there's no conflict at all in Python because of namespaces.
(3) I can't tell you what to name your class.
> and into which package should it go: sage.rings ?
Yes.
> shall it inherit from Ring?
Is it a ring? If so, then yes. Inheritance must *always* satisfy an
"is a" relationship. I.e., if you ever do
class X(Y):
...
then every instance of the class X has to be a special case of Y.
I.e., "Any X is a Y".
E.g., here, any lazy power series ring R is certainly a ring.
> Though it can also be used as a field if it is taken over a Field
> (i.e. has formal laurant series properties).
I can't tell you which to do. Field derives from Ring.
William
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