English

The cyclosyntomic regulator of a number field

Number Theory 2026-02-26 v1 Algebraic Geometry K-Theory and Homology

Abstract

We construct a q-deformation of the p-adic regulator of a number field, called the cyclosyntomic regulator, building on the Habiro ring of Garoufalidis-Scholze-Wheeler-Zagier. The key new ingredient in our construction is a refinement of Sulyma's norm maps in prismatic cohomology, which interpolate between classical powers and Frobenius maps at various prime numbers p. Furthermore, we compute the values of the cyclosyntomic regulator at units of the form 1ζ1-\zeta, where ζ\zeta is a root of unity.

Keywords

Cite

@article{arxiv.2602.21894,
  title  = {The cyclosyntomic regulator of a number field},
  author = {Tess Bouis and Quentin Gazda},
  journal= {arXiv preprint arXiv:2602.21894},
  year   = {2026}
}

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29 pages