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We study Bloch-Ogus theory and the Gersten conjecture for homology theories with duality satisfying certain properties, in particular for \'etale cohomology with finite coefficients coprime to the residue characteristic of the base, for…

Algebraic Geometry · Mathematics 2024-03-25 Morten Lüders

We show a conditional exactness statement for the Nisnevich Gersten complex associated to an $\mathbb{A}^1$-invariant cohomology theory with Nisnevich descent for smooth schemes over a Dedekind ring with only infinite residue fields. As an…

Algebraic Geometry · Mathematics 2019-04-08 Johannes Schmidt , Florian Strunk

The purpose of this article is to provide a version of Bloch-Wigner theorem over the class of rings with many units.

K-Theory and Homology · Mathematics 2009-07-05 Behrooz Mirzaii

We prove that the multiplicity of a filtration of a local ring satisfies various convexity properties. In particular, we show the multiplicity is convex along geodesics. As a consequence, we prove that the volume of a valuation is log…

Algebraic Geometry · Mathematics 2024-03-22 Harold Blum , Yuchen Liu , Lu Qi

Valuation rings and perfectoid rings are examples of (usually non-noetherian) rings that behave in some sense like regular rings. We give and study an extension of the concept of regular local rings to non-noetherian rings so that it…

Commutative Algebra · Mathematics 2022-09-27 Samuel Alvite , Nerea G. Barral , Javier Majadas

The purpose of this article is to prove that Gersten's conjecture for a commutative discrete valuation ring is true. Combining with the result of \cite{GL87}, we learn that Gersten's conjecture is true if the ring is a commutative regular…

K-Theory and Homology · Mathematics 2007-05-23 Satoshi Mochizuki

Using Bloch-Ogus theorem and Chern character from K-theory to cyclic homology, we answer a question of Green and Griffiths on extending Bloch formula. Moreover, we construct a map from local Hilbert functor to local cohomology. With…

Algebraic Geometry · Mathematics 2022-05-17 Sen Yang

We first study hyperplane sections of some singular schemes over a field. We prove a Bertini theorem for the log smoothness of generic hyperplane sections of a large class of log smooth schemes over a log point. We also give an abstract…

Number Theory · Mathematics 2014-06-05 Rémi Lodh

The main result of this paper is that in order to prove the local uniformization theorem for local rings it is enough to prove it for rank one valuations. Our proof does not depend on the nature of the class of local rings for which we want…

Commutative Algebra · Mathematics 2016-11-26 Josnei Novacoski , Mark Spivakovsky

We show that Bloch's complex of relative zero-cycles can be used as a dualizing complex over perfect fields and number rings. This leads to duality theorems for torsion sheaves on arbitrary separated schemes of finite type over…

Algebraic Geometry · Mathematics 2008-11-26 Thomas Geisser

In this paper, we define a generalization of the Brauer groups by using Bloch's cycle complex on etale site. We prove the Gersten conjecture of generalized Brauer group on some cases. As an application we prove the Gersten conjecture of the…

Number Theory · Mathematics 2016-11-08 Makoto Sakagaito

The strong factorization conjecture states that a proper birational map between smooth algebraic varieties over a field of characteristic zero can be factored as a sequence of smooth blowups followed by a sequence of smooth blowdowns. We…

Algebraic Geometry · Mathematics 2007-05-23 Kalle Karu

It is shown that, under some natural assumptions, the tensor product of differentially smooth algebras and the skew-polynomial rings over differentially smooth algebras are differentially smooth.

Rings and Algebras · Mathematics 2016-09-15 Tomasz Brzeziński , Christian Lomp

We investigate the local properties of Berkovich spaces over Z. Using Weierstrass theorems, we prove that the local rings of those spaces are noetherian, regular in the case of affine spaces and excellent. We also show that the structure…

Algebraic Geometry · Mathematics 2015-06-04 Jérôme Poineau

Let $D$ be a two-dimensional regular local ring. We prove there is a one-to-one correspondence between closed connected sets in the space of valuation overrings of $D$ that dominate $D$ and the integrally closed local overrings of $D$ that…

Commutative Algebra · Mathematics 2024-06-18 William Heinzer , K. Alan Loper , Bruce Olberding , Matt Toeniskoetter

In this paper, we show local Gersten's conjecture for regular system of parameters. As its consequence we obtain Gersten's conjecture for a commutative regular local ring and smooth over a commutative discrete valuation ring.

K-Theory and Homology · Mathematics 2020-08-07 Satoshi Mochizuki

We prove several results showing that the algebraic $K$-theory of valuation rings behave as though such rings were regular Noetherian, in particular an analogue of the Geisser--Levine theorem. We also give some new proofs of known results…

K-Theory and Homology · Mathematics 2018-10-30 Shane Kelly , Matthew Morrow

Taking an elementary and straightforward approach, we develop the concept of a regular value for a smooth map f: O -> P between smooth orbifolds O and P. We show that Sard's theorem holds and that the inverse image of a regular value is a…

Differential Geometry · Mathematics 2013-07-11 Joseph E. Borzellino , Victor Brunsden

In this article, we give a proof for a geometric presentation theorem for any irreducible scheme $X$ smooth projective over a discrete valuation ring $R$. As a consequence, for any reductive $R$-group scheme $\mathbf{G}$, we prove that any…

Algebraic Geometry · Mathematics 2023-02-07 Ning Guo , Ivan Panin

In this paper we study local-global principles for tori over semi-global fields, which are one variable function fields over complete discretely valued fields. In particular, we show that for principal homogeneous spaces for tori over the…

Algebraic Geometry · Mathematics 2020-11-24 Jean-Louis Colliot-Thélène , David Harbater , Julia Hartmann , Daniel Krashen , R. Parimala , V. Suresh
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