Updates:
Status: Started
Cc: ande...@mit.edu
Labels: -CodeInCategory-Code -CodeInImportedIntoGoogleDocs
Comment #4 on issue 3484 by julien.r...@gmail.com: Empty Product should
give one
http://code.google.com/p/sympy/issues/detail?id=3484
Someone started work on this at https://github.com/sympy/sympy/pull/1731
I guess my initial description should read "Product(n, (n, 2, 1)).doit()
should return 1." The empty product that everyone agrees on has (limits[2]
- limits[1]) == -1.
If we follow the Karr definition for reversed summations, c.f. issue 3175,
and apply it to reversed products, I imagine that we end up with this:
product(x(n), (n, 4, 0)) should give the same thing as product(x(n)**-1,
(n, 1, 3))
is that right?
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