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We investigate the class field theory for products of open curves over a local field. In particular, we determine the kernel of the reciprocity homomorphism.

Number Theory · Mathematics 2017-12-27 Toshiro Hiranouchi

As a continuation of arXiv:1412.6888, we study the reciprocity map for an open curve $X$ over a local field of characteristic $p>0$. We determine the $p$-part of the kernel of the reciprocity map after restricting ramification when the rank…

Number Theory · Mathematics 2018-03-16 Toshiro Hiranouchi

We prove that the the kernel of the reciprocity map for a product of curves over a $p$-adic field with split semi-stable reduction is divisible. We also consider the $K_1$ of a product of curves over a number field.

Number Theory · Mathematics 2007-10-15 Takao Yamazaki

We establish a ramified class field theory for smooth projective curves over local fields. As key steps in the proof, we obtain new results in the class field theory for 2-dimensional local fields of positive characteristic, and prove a…

Algebraic Geometry · Mathematics 2023-07-31 Amalendu Krishna , Subhadip Majumder

This paper studies the function field of an algebraic curve over an arbitrary perfect field by using the Weil reciprocity law and topologies on the adele ring. A topological subgroup of the idele class group is introduced and it is shown…

We study the class field theory of curve defined over two dimensional local field. The approch used here is a combination of the work of Kato-Saito, and Yoshida where the base field is one dimensional

Algebraic Geometry · Mathematics 2007-05-23 Belgacem Draouil

For a connected regular scheme X, flat and of finite type over Spec(Z), we construct a reciprocity homomorphism \rho_X: C_X --> \pi_1^\ab(X), which is surjective and whose kernel is the connected component of the identity. The (topological)…

Number Theory · Mathematics 2009-03-17 Moritz Kerz , Alexander Schmidt

In this paper, we study the kernel of the reciprocity map of certain simple normal crossing varieties over a finite field and give a example of a simple normal crossing surface whose reciprocity map is not injective for any finite scalar…

Number Theory · Mathematics 2014-11-12 Rin Sugiyama

We give a geometric interpretation of the reciprocal complement of an integral domain $D$ in the case $D$ is a one-dimensional finitely generated algebra over an algebraically closed field.

Commutative Algebra · Mathematics 2025-01-20 Dario Spirito

For a quasi-projective scheme $X$ admitting a smooth compactification over a local field of residue characteristic $p > 0$, we construct a continuous reciprocity homomorphism from a tame class group to the abelian tame etale fundamental…

Algebraic Geometry · Mathematics 2026-01-21 Rahul Gupta , Amalendu Krishna , Jitendra Rathore

We prove general results about completeness of cotorsion theories and existence of covers and envelopes in locally presentable abelian categories, extending the well-established theory for module categories and Grothendieck categories.…

Category Theory · Mathematics 2017-04-24 Leonid Positselski , Jiri Rosicky

We describe the additive subgroups of fields which are closed with respect to taking inverses. In particular, in characteristic different from two any such subgroup is either a subfield or the kernel of the trace map of a quadratic…

Rings and Algebras · Mathematics 2011-11-09 Sandro Mattarei

We investigate the surjectivity of the real cycle class map from $I$-cohomology to classical intergral cohomology for some real smooth varieties, in particular surfaces. This might be considered as one of several possible incarnations of…

K-Theory and Homology · Mathematics 2024-05-24 Jens Hornbostel

The kernel of a pair of linear systems is studied in the framework of commutative ring theory with applications to behavioral perspective of linear systems

Commutative Algebra · Mathematics 2016-03-10 Miguel V. Carriegos , Noemí DeCastro-García , Ángel Luis Muñoz Castañeda

Suppose $E$ is an elliptic curve defined over $\Q$. At the 1983 ICM the first author formulated some conjectures that propose a close relationship between the explicit class field theory construction of certain abelian extensions of…

Number Theory · Mathematics 2007-05-23 Barry Mazur , Karl Rubin

We give a new approach for the local class field theory of Serre and Hazewinkel. We also discuss two-dimensional local class field theory in this framework.

Number Theory · Mathematics 2013-10-21 Takashi Suzuki

Field Theories in Physics can be formulated giving a local Lagrangian density. Locality is imposed using the infinite jet bundle. That bundle is viewed as a pro-finite dimensional smooth manifold and that point of view has been compared to…

Mathematical Physics · Physics 2018-11-08 Nestor Leon Delgado

We develop class field theory of curves over $p$-adic fields which extends the unramified theory of S. Saito. The class groups which approximate abelian \'etale fundamental groups of such curves are introduced in the terms of algebraic…

Number Theory · Mathematics 2008-03-18 Toshiro Hiranouchi

We formulate and prove a generalized Albanese property for families of maps from a smooth curve over an arbitrary field into a commutative group stack. Our proof, which is mostly self-contained, employs local-to-global techniques and some…

Algebraic Geometry · Mathematics 2021-03-16 Justin Campbell , Andreas Hayash

Let $K$ be a finite extension of the $p$-adic numbers $\mathbb Q_p$ with ring of integers $\mathcal O_K$, $\mathcal X$ a regular scheme, proper, flat, and geometrically irreducible over $\mathcal O_K$ of dimension $d$, and $\mathcal X_K$…

Number Theory · Mathematics 2022-11-28 Thomas H. Geisser , Baptiste Morin
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