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On the divisibility of class numbers of imaginary quadratic fields (\( {\mathbb {Q}}(\sqrt{D}), {\mathbb {Q}}(\sqrt{D+m})\))

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Abstract

For a given odd positive number n and a positive integer m, we show that there exist infinitely many pairs of imaginary quadratic fields \( {\mathbb {Q}}(\sqrt{D}) \) and \( {\mathbb {Q}}(\sqrt{D+m}) \) with \(D\in {\mathbb {Z}}\) whose class groups have an element of order n.

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References

  1. Iizuka, Y.: On the class number divisibility of pairs of imaginary quadratic fields. J. Number Theory 184, 122–127 (2018)

    Article  MathSciNet  Google Scholar 

  2. Iizuka, Y., Konomi, Y., Nakano, S.: An application of the arithmetic of elliptic curves to the class number problem for quadratic fields, preprint

  3. Komatsu, T.: An infinite family of pairs of quadratic fields \( {\mathbb{Q}}(\sqrt{D}) \) and \( {\mathbb{Q}}(\sqrt{mD}) \) whose class numbers are both divisible by 3. Acta Arith. 104, 129–136 (2002)

    Article  MathSciNet  Google Scholar 

  4. Komatsu, T.: An infinite family of pairs of imaginary quadratic fields with ideal classes of a given order. Int. J. Number Theory 13(2), 253–260 (2017)

    Article  MathSciNet  Google Scholar 

  5. Milne, J.S.: Class field theory, preprint

  6. Yamamoto, Y.: On unramified Galois extensions of quadratic number fields. Osaka J. Math. 7, 57–76 (1970)

    MathSciNet  MATH  Google Scholar 

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Acknowledgements

We would like to thank the anonymous referee for the valuable comments and suggestions.

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Correspondence to Kuok Fai Chao.

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Xie, JF., Chao, K.F. On the divisibility of class numbers of imaginary quadratic fields (\( {\mathbb {Q}}(\sqrt{D}), {\mathbb {Q}}(\sqrt{D+m})\)). Ramanujan J 53, 517–528 (2020). https://doi.org/10.1007/s11139-019-00217-1

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  • DOI: https://doi.org/10.1007/s11139-019-00217-1

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