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? Øyvind -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
