Updates:
        Status: Started
        Owner: mattpap
        Labels: -NeedsBetterPatch NeedsReview Milestone-Release0.7.0

Comment #9 on issue 1801 by mattpap: igcd and ilcm could handle rationals
http://code.google.com/p/sympy/issues/detail?id=1801

btw2. It is now also possible to use gcd() and lcm() from polys11 for this, e.g.:

In [1]: gcd(S(4)/3, 2)
Out[1]: 2/3

In [2]: gcd([S(4)/3, 2, 6, S(12)/7])
Out[2]: 2/21

In [3]: lcm(S(4)/3, 2)
Out[3]: 4

(they will fall back to Number.gcd() or Number.lcm())

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