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Class groups of real cyclotomic fields

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Abstract

We prove that every finite abelian group G occurs as a subgroup of the class group of infinitely many real cyclotomic fields.

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References

  1. Brown, K.: Cohomology of groups, GTM 87. Springer Verlag, New York (1982)

    Book  Google Scholar 

  2. Cassels, J.W.S., Fröhlich, A.: Algebraic number theory. Academic Press, Cambridge (1993)

    Google Scholar 

  3. Cornell, G.: Abhyankar’s lemma and the class group, Lecture Notes in Mathematics, vol. 751, pp. 82–88. Springer, Berlin (1979)

  4. Cornell, G.: Exponential growth of the \(\ell \)-rank of the class group of the maximal real subfield of cyclotomic fields. Bull. Amer. Math. Soc. 8, 55–58 (1983)

    Article  MathSciNet  Google Scholar 

  5. Cornell, G., Rosen, M.: The \(\ell \)-rank of the real class group of cyclotomic fields. Compos. Math. 53(2), 133–141 (1984)

    MathSciNet  MATH  Google Scholar 

  6. Fröhlich, A.: Central extensions, Galois groups, and ideal class groups of number fields, Contemporary Math, vol. 24. American Math. Soc, Providence, Rhode Island (1983)

    Book  Google Scholar 

  7. Miller, C.: The second homology group of a group; relations among commutators. Proc. Amer. Math. Soc. 3, 588–595 (1952)

    Article  MathSciNet  Google Scholar 

  8. Miller, J.C.: Class numbers of totally real number fields, PhD Thesis, Rutgers University, (2015)

  9. Osada, H.: Note on the class-number of the maximal real subfield of a cyclotomic field. Manuscripta Math. 58, 215–227 (1987)

    Article  MathSciNet  Google Scholar 

  10. Osada, H.: Note on the class-number of the maximal real subfield of a cyclotomic field. II. Nagoya Math. J. 113, 147–151 (1989)

    Article  MathSciNet  Google Scholar 

  11. Schoof, R.: Class groups of real cyclotomic fields of prime conductor. Math. Comp. 72, 913–937 (2003)

    Article  MathSciNet  Google Scholar 

  12. Uchida, K.: Class numbers of cubic cyclic fields. J. Math. Soc. Japan 26, 447–453 (1974)

    Article  MathSciNet  Google Scholar 

  13. van der Linden, F.: Class number computations of real abelian number fields. Math. Comp. 39, 693–707 (1982)

    Article  MathSciNet  Google Scholar 

  14. Washington, L.C.: Introduction to cyclotomic fields, 2nd edn. Springer, Berlin (1997)

    Book  Google Scholar 

  15. Weinberger, P.J.: Real quadratic fields with class numbers divisible by \(n\). J. Number Theory 5, 237–241 (1973)

    Article  MathSciNet  Google Scholar 

  16. Yamaguchi, I.: On the class-number of the maximal real subfield of a cyclotomic field. J. reine angew. Math. 272, 217–220 (1974)

    MathSciNet  MATH  Google Scholar 

  17. 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

The first author’s work was partially supported by Infosys grant. He would like to thank his advisor Prof. K. Chakraborty for his constant support and guidance.

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Funding was provided by Infosys Foundation.

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Correspondence to Lawrence C. Washington.

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Communicated by John S. Wilson.

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Mishra, M., Schoof, R. & Washington, L.C. Class groups of real cyclotomic fields. Monatsh Math 195, 489–496 (2021). https://doi.org/10.1007/s00605-020-01499-0

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  • DOI: https://doi.org/10.1007/s00605-020-01499-0

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