Issue 1139: Description and Differentiation of vector, tensor, and
multivector fields.
http://code.google.com/p/sympy/issues/detail?id=1139
Comment #23 by ondrej.certik:
Not sure which error you are getting, but on my computer the problem was
with the
multidimensional decorator failing for lists. This works for me:
from sympy import *
class ImplicitFunction(Function):
def __new__(cls, Fstr, vars):
vars = tuple(vars)
obj = Function.__new__(cls, Fstr, *vars)
return obj
var("x y z")
f = ImplicitFunction("f", [x, y, z])
print f
------------
it prints:
ImplicitFunction(f, x, y, z)
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