On Wed, Mar 28, 2012 at 12:06 AM, Comer Duncan <comer.dun...@gmail.com>wrote:
> Hi Chris, > > > I have used this in my little implementation of the dual. Actually, I > first wrote my own Levi-Civita function only to discover later that it > is already done and in the tensor_functions module. Thanks for > checking. > > grep is helpful in this regard. I knew that I had seen it before and if it's in the namespace I do something like ``` >>> [w for w in dir() if 'Levi' in w] ['LeviCivita'] >>> help(LeviCivita) Help on class LeviCivita in module sympy.functions.special.tensor_functions: class LeviCivita(sympy.core.function.Function) | Represent the Levi-Civita symbol. | | For even permutations of indices it returns 1, for odd permutations -1, and | for everything else (a repeated index) it returns 0. ... ``` This doesn't help if it's not imported. In those cases, grep is your friend...and the sympy list :-) /c -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
