I forgot to mention in the SO post (not that I have mentioned plenty
already there) that sometimes I get the following error :
Traceback (most recent call last):
File "tensor.py", line 274, in
RC = R.find_Christoffel_tensor()
File "tensor.py", line 210, in find_Christoffel_tensor
R =
On Saturday, October 31, 2015 at 6:04:14 PM UTC+1, Imran Ali wrote:
>
> I just asked the following question at stackoverflow :
>
>
> http://stackoverflow.com/questions/33453941/determining-christoffel-symbols-and-curvature-tensors-for-a-flat-sphere-using-sy
>
> In essence, the question is two fol
If I simply hard code each metric, every thing works properly. For example,
take egg carton surface,
from sympy.diffgeom import Manifold, Patch, CoordSystem, TensorProduct
from sympy import sin,cos
dim = 2
m = Manifold("M",dim)
patch = Patch("P",m)
system = CoordSystem('eg
On Thursday, November 5, 2015 at 3:56:09 PM UTC+2, Imran Ali wrote:
>
> If I simply hard code each metric, every thing works properly. For
> example, take egg carton surface,
>
> from sympy.diffgeom import Manifold, Patch, CoordSystem, TensorProduct
> from sympy import sin,cos
> dim
Hi Kalevi!
I got the following output from srepr :
Symbol('u')
Differential(BaseScalarField(CoordSystem(Symbol('egg_carton'),
Patch(Symbol('P'), Manifold(Symbol('M'), Integer(2))), Tuple(Symbol('u'),
Symbol('v'))), Integer(0)))
I see now what the error is! My code used u as a sympy expression,
I was a bit quick there. srepr(u) gives the following output :
BaseScalarField(CoordSystem(Symbol('egg_carton'), Patch(Symbol('P'),
Manifold(Symbol('M'), Integer(2))), Tuple(Symbol('u'), Symbol('v'))),
Integer(0))
On Sunday, November 8, 2015 at 4:40:45 PM UTC+1, Imran Ali wrote:
>
> Hi Kalevi!
On Sunday, November 8, 2015 at 5:45:44 PM UTC+2, Imran Ali wrote:
>
> I was a bit quick there. srepr(u) gives the following output :
>
> BaseScalarField(CoordSystem(Symbol('egg_carton'), Patch(Symbol('P'),
> Manifold(Symbol('M'), Integer(2))), Tuple(Symbol('u'), Symbol('v'))),
> Integer(0))
>
>
What you should do is post the complete code to stackoverflow, as you
have done here.
Aaron Meurer
On Fri, Nov 6, 2015 at 10:51 AM, Kalevi Suominen wrote:
>
>
> On Thursday, November 5, 2015 at 3:56:09 PM UTC+2, Imran Ali wrote:
>>
>> If I simply hard code each metric, every thing works properly
I answered to you on StackOverflow. You should be more clear by posting
questions, this looks like a problem in your calculation logic, not in
SymPy.
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Hey Aaron!
Thanks for the tip, I posted the code on SO. But, I think that Kalevi
solved the problem. I found the issue.
On Friday, November 6, 2015 at 5:54:36 PM UTC+1, Aaron Meurer wrote:
>
> What you should do is post the complete code to stackoverflow, as you
> have done here.
>
> Aaron Meu
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