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Nine Chapters of Analytic Number Theory in Isabelle/HOL

Author Manuel Eberl

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Subject Classification

ACM Subject Classification
  • Mathematics of computing → Mathematical analysis
Keywords
  • Isabelle
  • theorem proving
  • analytic number theory
  • number theory
  • arithmetical function
  • Dirichlet series
  • prime number theorem
  • Dirichlet’s theorem
  • zeta function
  • L functions

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Abstract

In this paper, I present a formalisation of a large portion of Apostol’s Introduction to Analytic Number Theory in Isabelle/HOL. Of the 14 chapters in the book, the content of 9 has been mostly formalised, while the content of 3 others was already mostly available in Isabelle before.
The most interesting results that were formalised are: 
- The Riemann and Hurwitz zeta functions and the Dirichlet L functions 
- Dirichlet’s theorem on primes in arithmetic progressions 
- An analytic proof of the Prime Number Theorem 
- The asymptotics of arithmetical functions such as the prime omega function, the divisor count sigma_0(n), and Euler’s totient function phi(n)

Cite As Get BibTex

Manuel Eberl. Nine Chapters of Analytic Number Theory in Isabelle/HOL. In 10th International Conference on Interactive Theorem Proving (ITP 2019). Leibniz International Proceedings in Informatics (LIPIcs), Volume 141, pp. 16:1-16:19, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019) https://doi.org/10.4230/LIPIcs.ITP.2019.16

Author Details

Manuel Eberl
  • Technical University of Munich, Boltzmannstraße 3, Garching bei München, Germany

Funding

This work was supported by DFG grant NI 491/16-1. Part of it was conducted during a research visit in collaboration with the ALEXANDRIA project (ERC grant 742178).

Acknowledgements

I would like to thank John Harrison for doing all the incredibly hard work of creating an extensive library of complex analysis in HOL Light - the first of its kind - and Larry Paulson and Wenda Li for porting it to Isabelle/HOL and extending it even further. Without these efforts, my work would not have been possible. Larry Paulson also started off the analytic proof of the Prime Number Theorem in Isabelle and allowed me to take over and replace it with a more high-level approach. I also thank Jeremy Avigad and Johannes Hölzl, who commented on a draft of this document, and the anonymous reviewers, who gave a number of helpful suggestions.

Supplementary Materials

  • The proof developments in the Archive of Formal Proofs (AFP) that this work refers to are listed in the bibliography. Additionally, a precise overview of what material from the book has been formalised and which theorems in the book correspond to which theorems in the formalisation can be found at https://doi.org/10.5281/zenodo.3262266.

References

  1. Reynald Affeldt, Cyril Cohen, and Damien Rouhling. Formalization Techniques for Asymptotic Reasoning in Classical Analysis. J. Formalized Reasoning, 11(1):43-76, 2018. URL: https://doi.org/10.6092/issn.1972-5787/8124.
  2. Tom M. Apostol. Introduction to analytic number theory. Undergraduate Texts in Mathematics. Springer-Verlag, 1976. URL: https://doi.org/10.1007/978-1-4757-5579-4.
  3. Tom M. Apostol. Modular Functions and Dirichlet Series in Number Theory, volume 41 of Graduate Texts in Mathematics. Springer-Verlag, New York, 1990. URL: https://doi.org/10.1007/978-1-4612-0999-7.
  4. Andrea Asperti and Wilmer Ricciotti. A proof of Bertrand’s postulate. Journal of Formalized Reasoning, 5(1):37-57, 2012. URL: https://doi.org/10.6092/issn.1972-5787/3406.
  5. Jeremy Avigad, Kevin Donnelly, David Gray, and Paul Raff. A Formally Verified Proof of the Prime Number Theorem. ACM Trans. Comput. Logic, 9(1), December 2007. URL: https://doi.org/10.1145/1297658.1297660.
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  9. Julian Biendarra and Manuel Eberl. Bertrand’s postulate. Archive of Formal Proofs, January 2017. , Formal proof development. URL: http://isa-afp.org/entries/Bertrands_Postulate.html.
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  12. Manuel Eberl. Dirichlet L-functions and Dirichlet’s theorem. Archive of Formal Proofs, December 2017. , Formal proof development. URL: http://isa-afp.org/entries/Dirichlet_L.html.
  13. Manuel Eberl. Dirichlet series. Archive of Formal Proofs, October 2017. , Formal proof development. URL: http://isa-afp.org/entries/Dirichlet_Series.html.
  14. Manuel Eberl. The Euler–MacLaurin Formula. Archive of Formal Proofs, March 2017. , Formal proof development. URL: http://isa-afp.org/entries/Euler_MacLaurin.html.
  15. Manuel Eberl. The Hurwitz and Riemann ζ Functions. Archive of Formal Proofs, October 2017. , Formal proof development. URL: http://isa-afp.org/entries/Zeta_Function.html.
  16. Manuel Eberl. Elementary Facts About the Distribution of Primes. Archive of Formal Proofs, February 2019. , Formal proof development. URL: http://isa-afp.org/entries/Prime_Distribution_Elementary.html.
  17. Manuel Eberl. Verified Real Asymptotics in Isabelle/HOL. Draft available at https://www21.in.tum.de/~eberlm/real_asymp.pdf, 2019.
  18. Manuel Eberl and Lawrence C. Paulson. The Prime Number Theorem. Archive of Formal Proofs, September 2018. , Formal proof development. URL: http://isa-afp.org/entries/Prime_Number_Theorem.html.
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  23. Wenda Li and Lawrence C. Paulson. Evaluating Winding Numbers and Counting Complex Roots through Cauchy Indices in Isabelle/HOL. CoRR, abs/1804.03922, 2018. URL: http://arxiv.org/abs/1804.03922.
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