The gcd of $x^n1$ and $x^m1$ is $x^{gcd(n,m)}1$. Is it known what the greatest common divisor of $(x^{n_1}1)(x^{n_2}1)$ and $(x^{m_1}1)(x^{m_2}1)$ is?
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closed as too localized by Gjergji Zaimi, Chandan Singh Dalawat, Mark Sapir, Felipe Voloch, Qiaochu Yuan Feb 19 '12 at 17:29
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