On Dec 11, 2:22 am, "John Cremona" <[EMAIL PROTECTED]> wrote:
> 2008/12/11 mabshoff <[EMAIL PROTECTED]>:
<SNIP>
> > Cool. William was definitely exited about that patch and I am sure he
> > is happy to review it, too. He mentioned that this is the first open
> > source implementation of that algorithm that he is aware of, so
> > getting it in soon is definitely worth it. 3.2.2 so far seems to have
> > plenty of interesting patches merged already and there seems to be
> > more coming down the pipeline.
>
> Good! One of the troubles we have is that we are trying to compare
> results with Magma, but we are revealing a lot of bugs in Magma's
> implementation (which I am duly reporting to Steve Donelly in Sydney).
>
> For example, taking E=EllipticCurve('37a1') and S = set of the first n
> primes, the numbers of S-integral points we find for n=0..7 are
> 5,7,8,9,10,10,11,11,11 while Magma gets 5,6,7,7,7,7,7,7,7 which is
> rather bad (the time increases with #S, so it certainly helps to
> ignore most of the primes in S).
>
> I'm not sure if Simath counts as open source, probably not.
It certainly isn't, but if you look at
http://tnt.math.metro-u.ac.jp/simath/CHANGES
note the following:
[quote]
Version 3.9 --- Version 3.10
As usual, when a new version is released, there are some new and
improved algorithms, and many new programs have been incorporated into
simcalc. The basic structure of SIMATH has remained essentially
unchanged.
The GNU readline library is now part of the SIMATH distribution.
This
should make installation a little bit easier.
[end quote]
So I poked around a little and guess what: "simcalc/simov/
getline.S:#include <readline/readline.h>" and since readline is GPL
this looks like someone is potentially violating the GPL. IANAL and
all that applies obviously :)
> John
Cheers,
Michael
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