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We prove an extension of the Kato-Saito class field theory for smooth projective schemes over a finite field to schemes with singularities. As an application, we obtain Bloch's formula for the Chow groups of 0-cycles on such schemes. We…

Algebraic Geometry · Mathematics 2022-01-17 Mainak Ghosh , Amalendu Krishna

We show that, for a $K_0$-regular projective normal surface $X$ over a perfect field $k$ of positive characteristic and a reduced effective Cartier divisor $D\hookrightarrow X$, the Chow group of zero cycles on $X$ with modulus $D$…

Algebraic Geometry · Mathematics 2025-07-22 Teppei Nakamura

We show that the Chow group of 0-cycles on a singular projective scheme $X$ over a finite field describes the abelian extensions of its function field which are unramified over the regular locus of $X$. As a consequence, we obtain the…

Algebraic Geometry · Mathematics 2015-02-06 Amalendu Krishna

We show that for a smooth projective variety $X$ over a field $k$ and a reduced effective Cartier divisor $D \subset X$, the Chow group of 0-cycles with modulus $\mathrm{CH}_0(X|D)$ coincides with the Suslin homology $H^S_0(X \setminus D)$…

Algebraic Geometry · Mathematics 2022-09-02 Federico Binda , Amalendu Krishna

We present a relation between the classical Chow group of relative $0$-cycles on a regular scheme $\mathcal{X}$, projective and flat over an excellent Henselian discrete valuation ring, and the Levine-Weibel Chow group of 0-cycles on the…

Algebraic Geometry · Mathematics 2019-10-04 Federico Binda , Amalendu Krishna

We generalize a recent result of Pavic--Schreieder regarding the surjectivity of the obstruction morphism defined in [PS23]. As a consequence of this result, we show that geometrically (retract) rational varieties over a Laurent field of…

Algebraic Geometry · Mathematics 2024-02-23 Jan Lange

We study zero-cycles in families of rationally connected varieties. We show that for a smooth projective scheme over a henselian discrete valuation ring the restriction of relative zero cycles to the special fiber induces an isomorphism on…

Algebraic Geometry · Mathematics 2024-07-11 Morten Lüders

The notion of modulus is a striking feature of Rosenlicht-Serre's theory of generalized Jacobian varieties of curves. It was carried over to algebraic cycles on general varieties by Bloch-Esnault, Park, R\"ulling, Krishna-Levine. Recently,…

Algebraic Geometry · Mathematics 2016-05-24 Federico Binda , Jin Cao , Wataru Kai , Rin Sugiyama

We study the Chow group of zero-cycles of smooth projective varieties over local and strictly local fields. We prove in particular the injectivity of the cycle class map to integral l-adic cohomology for a large class of surfaces with…

Algebraic Geometry · Mathematics 2019-11-21 Hélène Esnault , Olivier Wittenberg

One of the main results of this paper is a proof of the rank one case of an existence conjecture on lisse l-adic sheaves on a smooth variety over a finite field due to Deligne and Drinfeld. The problem is translated into the language of…

Number Theory · Mathematics 2017-02-22 Moritz Kerz , Shuji Saito

We prove a decomposition theorem for the cohomological Chow group of 0-cycles on the double of a quasi-projective $R_1$-scheme over a field along a closed subscheme, in terms of the Chow groups, with and without modulus, of the scheme. This…

Algebraic Geometry · Mathematics 2022-07-25 Rahul Gupta , Amalendu Krishna , Jitendra Rathore

Given a smooth variety $X$ and an effective Cartier divisor $D \subset X$, we show that the cohomological Chow group of 0-cycles on the double of $X$ along $D$ has a canonical decomposition in terms of the Chow group of 0-cycles ${\rm…

Algebraic Geometry · Mathematics 2019-02-20 Federico Binda , Amalendu Krishna

In this paper we prove a finiteness result concerning the Chow group of zero-cycles for varieties over $p$-adic local fields. In this final version, there are several corrections concerning mathematical symbols and reference to related…

Algebraic Geometry · Mathematics 2010-01-24 Shuji Saito , Kanetomo Sato

A conjecture of Colliot-Th\'{e}l\`{e}ne predicts that for a smooth projective variety $X$ over a finite extension $k$ of $\mathbb{Q}_p$ the kernel of the Albanese map $\text{CH}_0(X)^{\text{deg}=0}\to Alb_X(k)$ is the direct sum of a…

Algebraic Geometry · Mathematics 2026-05-27 Evangelia Gazaki , Jitendra Rathore

We study the restriction map to the closed fiber of a regular projective scheme over an excellent henselian discrete valuation ring, for a cohomological version of the Chow group of relative zero-cycles. Our main result extends the work of…

Algebraic Geometry · Mathematics 2019-11-21 Moritz Kerz , Hélène Esnault , Olivier Wittenberg

We show that the chow group of $p$-cycles with rational coefficients are isomorphic to the corresponding rational homology groups for smooth complex projective varieties carrying a holomorphic vector field with an isolated zero locus. As…

Algebraic Geometry · Mathematics 2019-11-13 Wenchuan Hu

In this paper we study the group $A_0(X)$ of zero dimensional cycles of degree 0 modulo rational equivalence on a projective homogeneous algebraic variety $X$. To do this we translate rational equivalence of 0-cycles on a projective variety…

Algebraic Geometry · Mathematics 2007-05-23 Daniel Krashen

Auel-Bigazzi-B\"ohning-Graf von Bothmer proved that if a proper smooth variety $X$ over a field $k$ of characteristic $p>0$ has universally trivial Chow group of $0$-cycles, the cohomological Brauer group of $X$ is universally trivial as…

Algebraic Geometry · Mathematics 2022-08-16 Shusuke Otabe

We prove Bloch's formula for the Chow group of 0-cycles with modulus on a smooth quasi-projective surface over a field. We use this formula to give a simple proof of the rank one case of a conjecture of Deligne and Drinfeld on lisse…

Algebraic Geometry · Mathematics 2021-08-25 Federico Binda , Amalendu Krishna , Shuji Saito

We show an example of Chow group of 0-cycles on surface over a p-adic field which has infinite torsion subgroup.

Algebraic Geometry · Mathematics 2007-05-23 Masanori Asakura , Shuji Saito
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