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Results tagged with formal-groups
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user 8008
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Is there a better proof of this fact in number theory/formal group theory?
Define $a_n=\Phi_n(1)$ except $a_1=1$. These values are uniquely determined by $$n=\prod_{d \mid n}a_d.$$ From this it would be quick to get $a_n=c_n$ but , as requested, we won't. An important step i …
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