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Thaine's theorem : ウィキペディア英語版 | Thaine's theorem In mathematics, Thaine's theorem is an analogue of Stickelberger's theorem for real abelian fields, introduced by . Thaine's method has been used to shorten the proof of the Mazur–Wiles theorem , to prove that some Tate–Shafarevich groups are finite, and in the proof of Mihăilescu's theorem . ==Formulation== Let and be distinct odd primes with not dividing . Let be the Galois group of over , let be its group of units, let be the subgroup of cyclotomic units, and let be its class group. If annihilates then it annihilates .
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