hi,
I would like to use nabla as div or grad operator, in sagemanifolds it's
used as levita-civita, how could it be use as them if it's possible ?
Regards
Henri
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Hi, Dima; thanks for taking the time to help out a noob -- again.
This is what I did:
sage: a,b,y,z=var('a,b,y,z')
sage: p=z*x^2+x^2-(x^2+y^2)*(a*x-2*b*y)+z*y^2+y^2
sage: type(p)
The book says that I should be able to do this:
sage: p.collect(x).collect(y)
And get this in return:
sage: 2*b*y*
how is p created? what is the output of
type(p)
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I'm using a Ubuntu 18.04.1 LTS, currently with Xfce4, but also Lxde, on a
Dell G7 with i7-8750H cpu and 16 gb of ram, and I built Sage version 8.3
from source.
The text I'm working from say that I should get this result:
sage: p.collect(x).collect(y)
sage: 2*b*y*x^2 + 2*b*y^3−(a*x−z−1)*x^2−(a
seems like we look at a tip of py2/3 string/unicode iceberg mess... :-)
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Hi.
I'm using this polynomial:
p = z*x^2 + x^2 − (x^2 + y^2 )*(a*x − 2*b*y) + z*y^2 + y^2
and when I issue this command:
p.collect(x).collect(y)
to Sage 8.3 in the terminal, I get this response:
-a*x^3 + 2*b*x^2*y + 2*b*y^3 - (a*x - z - 1)*y^2 + x^2*z + x^2
Notice that only y is collected.
He
IMHO thats a bug that we should report to pip upstream... can you do that
with your distribution details?
On Saturday, August 18, 2018 at 9:15:04 PM UTC+2, Luis Finotti wrote:
>
>
>
> On Saturday, August 18, 2018 at 4:58:39 AM UTC-4, Volker Braun wrote:
>>
>> pip chokes on parsing /etc/$DISTRO-r
