Comment #3 on issue 2042 by sherjilo...@gmail.com: Frac() object for
rational function arithmetics
http://code.google.com/p/sympy/issues/detail?id=2042
We should atleast implement a basic Frac object, even if its not as
exhaustive as Polys, so that asmeurer and I can use it in our own projects
with the confidence that Frac will be improved later. A wrapper over DMFs
would suffice for the moment. You can always work on expanding the
internals later. The encapsulated object to the outsiders remains the same,
the mathematical object rational function.
According to wiki,
"In mathematics, a rational function is any function which can be written
as the ratio of two polynomial functions. Neither the coefficients of the
polynomials nor the values taken by the function are necessarily rational."
So, understanding Frac as Poly / Poly is good enough for now, IMHO.
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