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We show how the classification of simple singularities of functions can be reduced directly, not using the normal forms, to the classification of irreducible Weyl groups. We also prove that the class of a singularity in its local algebra…

alg-geom · Mathematics 2008-02-03 Mikhail Entov

We prove a localization formula for virtual fundamental classes in the context of torus equivariant perfect obstruction theories. As an application, the higher genus Gromov-Witten invariants of projective space are expressed as graph sums…

alg-geom · Mathematics 2008-02-03 T. Graber , R. Pandharipande

We introduce a new concept of s-recollements of extriangulated categories, which generalizes recollements of abelian categories, recollements of triangulated categories, as well as recollements of extriangulated categories. Moreover, some…

Representation Theory · Mathematics 2021-07-30 Yonggang Hu , Panyue Zhou

The descent method is one of the approaches to study the Brauer--Manin obstruction to the local--global principle and to weak approximation on varieties over number fields, by reducing the problem to ``descent varieties''. In recent lecture…

Algebraic Geometry · Mathematics 2026-01-21 Nguyen Manh Linh

We unify the Kumjian-Renault Weyl groupoid construction with the Lawson-Lenz version of Exel's tight groupoid construction. We do this by utilising only a weak algebraic fragment of the C*-algebra structure, namely its *-semigroup reduct.…

Operator Algebras · Mathematics 2020-12-10 Tristan Bice

In this article first we develop the Gabriel localizations (abbreviated as G-localizations) for commutative rings, specially some new results in this direction are proven. Then, as an application, it is shown that a ring map is a flat…

Commutative Algebra · Mathematics 2016-11-04 Abolfazl Tarizadeh

We extend Cuntz-Quillen's excision theorem for algebras and pro-algebras in arbitrary Q-linear categories with tensor product.The excision theorems for the bivariant periodic cyclic cohomology of discrete,topological and bornological…

K-Theory and Homology · Mathematics 2011-08-03 Guillermo Cortiñas , Christian Valqui

This paper proposes a general machine learning framework called the localization method, which is fundamentally built on two core concepts: localization kernels and local means -- key components that underpin the self-attention mechanism.…

Machine Learning · Computer Science 2026-05-28 Congwei Song

In this paper local polynomials on Abelian groups are characterized by a "local" Fr\'echet-type functional equation. We apply our result to generalize Montel's Theorem and to obtain Montel-type theorems on commutative groups.

Functional Analysis · Mathematics 2014-03-19 J. M. Almira , L. Székelyhidi

We study a local to global principle for certain higher zero-cycles over global fields. We thereby verify a conjecture of Colliot-Th\'el\`ene for these cycles. Our main tool are the Kato conjectures proved by Jannsen, Kerz and Saito. Our…

Algebraic Geometry · Mathematics 2019-06-12 Johann Haas , Morten Lüders

Let R be a commutative Noetherian ring. We introduce the notion of colocalization functors with supports in arbitrary subsets of Spec R, which is a natural generalization of right derived functors of section functors with supports in…

Commutative Algebra · Mathematics 2017-09-12 Tsutomu Nakamura , Yuji Yoshino

We show a strong factorization theorem of Dixmier-Malliavin type for ultradifferentiable vectors associated with compact Lie group representations on sequentially complete locally convex Hausdorff spaces. In particular, this solves a…

Functional Analysis · Mathematics 2026-02-13 Andreas Debrouwere , Michiel Huttener , Jasson Vindas

Using the formalism of Grothendieck's derivators, we construct `the universal localizing invariant of dg categories'. By this, we mean a morphism U_l from the pointed derivator associated with the Morita homotopy theory of dg categories to…

K-Theory and Homology · Mathematics 2008-09-18 Goncalo Tabuada

We prove some vanishing theorems for the cohomology groups of local systems associated to Laurent polynomials. In particular, we extend one of the results of Gelfand-Kapranov-Zelevinsky into various directions.

Algebraic Geometry · Mathematics 2018-11-01 Alexander Esterov , Kiyoshi Takeuchi

We show that there are four possibilities for the product of all elements in the multiplicative group of a quotient of the ring of integers in a number field, and give precise conditions for each of the possibilities to occur. This…

Number Theory · Mathematics 2013-01-09 Chandan Singh Dalawat

We formulate a generalization of a `refined class number formula' of Darmon. Our conjecture deals with Stickelberger-type elements formed from generalized Stark units, and has two parts: the `order of vanishing' and the `leading term'.…

Number Theory · Mathematics 2013-12-17 Barry Mazur , Karl Rubin

The main purpose of this article is to present a localization of Forelli's theorem for the functions holomorphic along a standard suspension of linear discs. This generalizes one of the main results of \cite{CK21} and the original Forelli's…

Complex Variables · Mathematics 2022-08-30 Ye-Won Luke Cho

A differential version of the classical Weil descent is established in all characteristics. It yields a theory of differential restriction of scalars for differential varieties over finite differential field extensions. This theory is then…

Algebraic Geometry · Mathematics 2018-07-31 Omar León Sánchez , Marcus Tressl

The main contribution of this paper is a generalization of several previous localization theories in equivariant symplectic geometry, including the classical Atiyah-Bott/Berline-Vergne localization theorem, as well as many cases of the…

Symplectic Geometry · Mathematics 2012-06-25 Megumi Harada , Yael Karshon

The authors establish a connection between the Quillen K-theory of certain local fields and the de Rham-Witt complex of their rings of integers with logarithmic poles at the maximal ideal. They consider fields K that are complete discrete…

K-Theory and Homology · Mathematics 2019-08-12 Lars Hesselholt , Ib Madsen
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