文摘
We generalize the notions of Kolyvagin and pre-Kolyvagin systems to prove “refined class number formulas-for quadratic extensions of a quadratic imaginary fields \(K\) of class number one. Our main result generalises the results and conjectures of Darmon (Canad. J. Math. 47:302-17, 1995), by replacing circular units in abelian extensions of \(\mathbb {Q}\) by elliptic units in abelian extensions of K.