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Paper   IPM / M / 17254
School of Mathematics
  Title:   Ostrowski quotient for finite extensions of number fields
  Author(s): 
1.  Ali Rajaei
2.  Abbas Maarefparvar (Joint with E. Shahoseini)
  Status:   Published
  Journal: Pacific J. Math.
  Vol.:  321
  Year:  2022
  Pages:   415-429
  Supported by:  IPM
  Abstract:
For L/K a finite Galois extension of number fields, the relative P\'olya group Po(L/K) coincides with the group of strongly ambiguous ideal classes in L/K. In this paper, using a well-known exact sequence related to Po(L/K) in the works of Brumer-Rosen and Zantema, we find short proofs for some classical results in the literature. Then we define the ``Ostrowski quotient'' Ost(L/K) as the cokernel of the capitulation map into Po(L/K) and generalize some known results for Po(L/Q) to Ost(L/K).

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