Řyvind Jensen wrote:
I'm running it in my working directory without installing it. I added a
__init__.py file with just the line "import tensor", and now it works.
[...@ubuntulaptop sympy (alan)]$ cat sympy/tensor/__init__.py
import tensor
The problem I see with regard to using the functions associated with
'Expr' is the problem with the tensor contraction operation. If it were
not for contraction subclassing 'Expr' would be a great idea. I would
welcome any ideas on how to make 'Expr' compatible with contraction.
Could there be a problem in subclassing 'Expr' when the required
operators are more that just +,-,*, and / ?
What is the specific problem with the tensor contraction?
Řyvind
How do you make substitute check and see if the co and contra-variant
ranks of the tensor being substituted are the same as the original?
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