What is the fundamental unit of $Q(\zeta_n)$, where $\zeta_n$ is the primitive $n$-th root of the unity?
Is there an explicit algorithm to compute it?
I could find https://mathoverflow.net/a/204551/111528 on mathoverflow.
2026-03-25 11:25:35.1774437935
Fundamental Unit in cylotomic fields
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