Hi everyone,
I was going through the concept of graphs as matroids and I came upon the
rank of a graph. Wikipedia lists it as n - c, n = |V|, c = # of connected
components.
I do understand rank and nullity of matrices, and graphs when expressed in
their incidence matrix form have a one-to-one
> but Sage says " name 'ans' is not defined".
>
That looks like a bug that - I believe - was fixed in 6.1. So maybe you
should upgrade to the newest version. However in 6.1 this also yields an
error, the one explained by David.
Chris.
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I tried this example myself and got a similar failure. The error
message is not very informative, but what's happening is that PARI-GP
(which Simon's 2-descent script uses) is raising an error, because the
fundamental units of the number fields coming up in the 2-descent
calculation are too big for
Thank you very much for your message.
I used simon_two_descent(), for [0,0,0,- 9588522241, 399039337488961],
but Sage says " name 'ans' is not defined". I do not know what 'ans'
is.
Best,
Raman
On 2/6/14, William Stein wrote:
> On Wed, Feb 5, 2014 at 1:06 PM, raman kurdi
> wrote:
>> Hi Sage,
>>
On Wed, Feb 5, 2014 at 1:06 PM, raman kurdi wrote:
> Hi Sage,
>
> I have some curves with rank at least 4. But I can not compute the
> rank by Mwrank. I use (' -p 200 -v 0').
> Could you please help me?
>
You might find this example useful, which shows your first curve has rank 5.
sage: E = Elli
Hi Sage,
I have some curves with rank at least 4. But I can not compute the
rank by Mwrank. I use (' -p 200 -v 0').
Could you please help me?
Best,
Raman
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Hello
I used the Mwrank option -p 300 to calculate the rank of curve
Curve
[0,1,0,-159627308733826113531278066761692301750824909156,-24543003331398069071481672747624345262031248143014554550977848062108256]
:
2<= rank <= 3
Also I used option -s to its selmer rank so its selmer rank was 3.
Is it tr
