Hi John,
> > Group --> WierstrassIsomorphismGroup
> > GroupElement --> WeierstrassIsomorphism
>
> OK I'll try that.
On this subject, I had the idea that an Iso(X,Y) subset of Hom(X,Y)
should
be defined for every category. Note that the subset Aut(X) of an
End(X) is
a group, but in general the W
William Stein wrote:
>
> Incidentally, there are 194 members of sage-devel, and there
> were 756 messages posted last month.
>
In total from 2005.10.22 my count of messages is 6731.
The first from David Joyner:
>> Stay tuned: SAGE 0.8 will be released soon with some great new features.
Ja
On 9/24/07, John Cremona <[EMAIL PROTECTED]> wrote:
> > One of the first "rules" of managing a large open source software
> > development
> > project well is to do as much as possible in the public. For example the
> > above discussion about classes, etc., could be useful to many people,
> > es
On 9/24/07, William Stein <[EMAIL PROTECTED]> wrote:
>
> On 9/24/07, John Cremona <[EMAIL PROTECTED]> wrote:
> > What's your view of having a class to hold the [u,r,s,t], derived from
> > the abstract Group class? It could be called WeirstrassIsomorphism
> > perhaps.
>
> Group --> WierstrassIsomo
On 9/24/07, John Cremona <[EMAIL PROTECTED]> wrote:
> What's your view of having a class to hold the [u,r,s,t], derived from
> the abstract Group class? It could be called WeirstrassIsomorphism
> perhaps.
Group --> WierstrassIsomorphismGroup
GroupElement --> WeierstrassIsomorphism
> I'll have
What's your view of having a class to hold the [u,r,s,t], derived from
the abstract Group class? It could be called WeirstrassIsomorphism
perhaps. I'll have to read up on derived classes in python since I
only know them in C++.
John
PS If a subset of sage-devel is thinking about something whic
On 9/24/07, John Cremona <[EMAIL PROTECTED]> wrote:
> I'm sure you are right but doing that on my own (and in the next day
> or two) is beyond my sage/python capabilities... to start with (and
> as these isomorphisms of Weierstrass models are so much simpler than
> more general isogenies) I was g
Thanks -- All this week (off and on) is ok, and I expect that my
afternoons will be your mornings, my evenings your afternoons. For
the 3 weeks after this I'll be much harder to get hold of.
John
On 9/24/07, David Roe <[EMAIL PROTECTED]> wrote:
> John,
> At the end of the spring I began working
John,
At the end of the spring I began working on porting your Magma code
implementing Tate's algorithm for elliptic curves and p-adic heights to
Sage. I made a lot of progress, but discovered that I needed to write a few
new classes for elliptic curves over number fields. It sounds like some of
David,
I'm sure you are right but doing that on my own (and in the next day
or two) is beyond my sage/python capabilities... to start with (and
as these isomorphisms of Weierstrass models are so much simpler than
more general isogenies) I was going to be much more simple-minded and
just have a l
Hi John,
I would strongly suggest that this construction be compatible
with isogenies (also yet to be implemented). Thus one should
be able to compose isomorphisms and isogenies with one
another. Moreover, one should be able to access the defining
polynomials -- this is useful to verify the def
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