> depends(f,x);
> solve(at(diff(f,x,1),x=exp(x))+f=3,at(diff(f,x,1),x=exp(x)));
>
> which returns at(diff(f,x,1),x=exp(x)) = 3-f, as expected.
>
If you want to implement this, you will then somehow have to tell
InterfaceInit.derivative() to look out for the situation where the
variable isn't a v
q wrote:
> I'm just going to give up, because doing all this took me many hours,
> and I had to learn/try a lot of stuff about working with the command
> line that I've never done before. The installation directions are
> confusing to someone who doesn't know very much about computers. I
> mean, I
q wrote:
> Thanks for the replies everyone.
>
> I tried it, and as someone mentioned, the space between eigenvalues
> and () doesn't make a difference.
>
> So I tried updating. I installed the binary distribution, but got the
> "Illegal instruction" error at startup. So I tried the
>
> rm spkg/
Thanks for the replies everyone.
I tried it, and as someone mentioned, the space between eigenvalues
and () doesn't make a difference.
So I tried updating. I installed the binary distribution, but got the
"Illegal instruction" error at startup. So I tried the
rm spkg/installed/mpir* spkg/instal
On Nov 5, 2009, at 1:09 PM, David Holmes wrote:
>
> Hi,
>
> I am trying to write a subclass of the class of hypereliptic curves
> over QQ, for example:
>
> class test
> (sage
> .schemes
> .hyperelliptic_curves
> .hyperelliptic_rational_field.HyperellipticCurve_rational_field):
>def __init__(s
Hi David,
If you type
sage: X = test(H)
you notice that doesn't give an error. So the problem occurs when
Sage tries to print your object X. Since you haven't defined a
_repr_() method for your class, Sage tries to use the one inherited
from the hyperelliptic curve class. You can see the co
Bryan Wilcox wrote:
> Hi all,
>
> Sorry for the slow response. I got inundated with work and couldn't
> get back to this until now.
>
> If I'm following this correctly the state of the keepfloat environment
> variable changes the results of the computation. If this variable is
> kept as true, pe
Hi all,
Sorry for the slow response. I got inundated with work and couldn't
get back to this until now.
If I'm following this correctly the state of the keepfloat environment
variable changes the results of the computation. If this variable is
kept as true, per Sage's default and for the reasons
Okay. Here is what will work.
The package loading mechanism has changed so my quick hack
to create a package from Maagard et al's files will not work
now. I'll try to fix it eventually when I have time...
1. Download and extract Maagard's tarball anywhere, say to
/Users/me/gapfiles/braid
(so /Us
Hi,
I am trying to write a subclass of the class of hypereliptic curves
over QQ, for example:
class test
(sage.schemes.hyperelliptic_curves.hyperelliptic_rational_field.HyperellipticCurve_rational_field):
def __init__(self,C):
self.C = C
then in sage I type
R. = QQ[]
H = Hyperelli
On 5 lis, 20:41, kcrisman wrote:
> Turns out Maxima does not like to eat expressions like this anyway:
>
> diff(f,e^x,1)
>
> because exp(x) is not a variable. Perhaps it is impossible to use
> these in this way?
I think that in Maxima we can use something like this:
depends(f,x);
solve(at(di
>
> However, we can't just naively put ex in for args in the final thing,
> since it's not a tuple, and it might break something else. I will
> look into this, but if anyone else has some ideas it'd be great.
Turns out Maxima does not like to eat expressions like this anyway:
diff(f,e^x,1)
be
On Thu, Nov 5, 2009 at 10:31 AM, Michael Orlitzky wrote:
>
> Jason Grout wrote:
>>
>> Interesting. I consider a brief discussion of numerical instability an
>> essential feature of a first-semester linear algebra course. These
>> students will most likely be using numerical linear algebra in re
> sage: f=function('f',x)
> sage: A=f.diff().subs(x=exp(x))
> sage: A._maxima_()
> 'diff('f(x),x,1)
> sage:
>
> perhaps, something has to be improved in trac which implemented
> derivatives at a point into Sagehttp://trac.sagemath.org/sage_trac/ticket/385
This is orthogonal to this, though a revi
On Thu, Nov 5, 2009 at 10:11 AM, Adam Sorkin wrote:
>
> Moving to a directly having the braid files, I get
>
> sage: gap.eval('Read("assemble.g")')
> ' '
>
> but when I try to run Braid, I get the error
>
> sage: Braid(g,t)
> ---
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