English

Counting $D_4$-field extensions by multi-invariants

Number Theory 2025-07-17 v1

Abstract

We count the number of Galois extensions M/QM/\mathbb{Q} with fixed Galois group Gal(M/Q)=D4\text{Gal}(M/\mathbb{Q})=D_4 ordered by multi-invariants introduced by Gundlach. We verify the asymptotic behavior predicted by Gundlach's version of Malle's conjecture. We compare the leading constant to recent predictions by Loughran and Santens.

Keywords

Cite

@article{arxiv.2507.12342,
  title  = {Counting $D_4$-field extensions by multi-invariants},
  author = {Willem Hansen and Anna Zanoli},
  journal= {arXiv preprint arXiv:2507.12342},
  year   = {2025}
}

Comments

28 pages, comments welcome

R2 v1 2026-07-01T04:04:30.695Z