Comment #8 on issue 2305 by ronan.l...@gmail.com: Integer(3).sqrt() == 1 (Rename Integer.sqrt to Integer.isqrt)
http://code.google.com/p/sympy/issues/detail?id=2305
Yes, I think the methods gcd, lcm, gcdex, half_gcdex should also be removed. They weren't there in 0.6.7, so there's no compatibility problem in doing so.
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