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In this paper we prove the 2-local part of the Beilinson-Lichtenbaum conjectures on tosion in motivic cohomology. In particular we prove the Milnor conjecture relating Milnor's K-theory and the Galois cohomology with Z/2-coefficients. This…

Algebraic Geometry · Mathematics 2007-05-23 Vladimir Voevodsky

Let $G$ be a connected linear algebraic group over a field $k$ of characteristic zero. For a principal $G$-bundle $\pi: E \to X$ over a scheme $X$ of finite type over $k$ and a parabolic subgroup $P$ of $G$, we describe the rational…

Algebraic Geometry · Mathematics 2010-07-08 Amalendu Krishna

We prove a conjecture of Shklyarov concerning the relationship between K. Saito's higher residue pairing and a certain pairing on the periodic cyclic homology of matrix factorization categories. Along the way, we give new proofs of a result…

K-Theory and Homology · Mathematics 2020-10-08 Michael K. Brown , Mark E. Walker

We initiate a systematic study of the cohomology of cluster varieties. We introduce the Louise property for cluster algebras that holds for all acyclic cluster algebras, and for most cluster algebras arising from marked surfaces. For…

Algebraic Geometry · Mathematics 2022-03-09 Thomas Lam , David E. Speyer

For a Lie algebroid, divergences chosen in a classical way lead to a uniquely defined homology theory. They define also, in a natural way, modular classes of certain Lie algebroid morphisms. This approach, applied for the anchor map,…

Differential Geometry · Mathematics 2008-11-26 Janusz Grabowski , Giuseppe Marmo , Peter W. Michor

We give an explicit description of the set of all factorization structures, or twisting maps, existing between the algebras k^2 and k^2, and classify the resulting algebras up to isomorphism. In the process we relate several different…

Rings and Algebras · Mathematics 2016-08-16 Javier López Peña , Gabriel Navarro

The Rota--Heron--Welsh conjecture (now a theorem of Adiprasito, Huh, and the author) asserts the log-concavity of the characteristic polynomial of matroids. We give an exposition of the Lorentzian polynomial proof following the work of…

Combinatorics · Mathematics 2025-08-13 Eric Katz

We prove first-order naturality of involutive Heegaard Floer homology, and furthermore construct well-defined maps on involutive Heegaard Floer homology associated to cobordisms between three-manifolds. We also prove analogous naturality…

Geometric Topology · Mathematics 2025-07-04 Kristen Hendricks , Jennifer Hom , Matthew Stoffregen , Ian Zemke

A new relation between homoclinic points and Lagrangian Floer homology is presented: In dimension two, we construct a Floer homology generated by primary homoclinic points. We compute two examples and prove an invariance theorem. Moreover,…

Symplectic Geometry · Mathematics 2017-04-11 Sonja Hohloch

We prove that the LOSS and GRID invariants of Legendrian links in knot Floer homology behave in certain functorial ways with respect to decomposable Lagrangian cobordisms in the symplectization of the standard contact structure on…

Geometric Topology · Mathematics 2019-07-30 John A. Baldwin , Tye Lidman , C. -M. Michael Wong

Factorizations of monoids are studied. Two necessary and sufficient conditions in terms of so-called descent 1-cocyles for a monoid to be factorized through two submonoids are found. A full classification of those factorizations of a monoid…

Rings and Algebras · Mathematics 2022-03-07 Zsolt Adam Balogh , Tamar Mesablishvili

The Borel-Weil-Bott theorem describes the cohomology of line bundles over flag varieties. Here, one generalizes this theorem to a wider class of projective varieties : the wonderful varieties of minimal rank.

Algebraic Geometry · Mathematics 2007-05-23 Alexis Tchoudjem

We show that it is consistent that the Borel Conjecture and the dual Borel Conjecture hold simultaneously.

Logic · Mathematics 2015-09-07 Martin Goldstern , Jakob Kellner , Saharon Shelah , Wolfgang Wohofsky

We prove a relative statement about the slices of the algebraic cobordism spectrum. If the map from MGL to a certain quotient of MGL introduced by Hopkins and Morel is the map to the zero-slice then a relative version of Voevodsky's…

Algebraic Geometry · Mathematics 2009-05-27 Markus Spitzweck

Suppose that Y is a cyclic cover of projective space branched over a hyperplane arrangement D, and that U is the complement of the ramification locus in Y. The first theorem implies that the Beilinson-Hodge conjecture holds for U if certain…

Algebraic Geometry · Mathematics 2019-08-15 Donu Arapura

We construct orbifolds with quasitoric boundary and show that they have stable almost complex structure. We show that a quasitoric orbifold is complex cobordant to finite disjoint copies of complex orbifold projective spaces. Finally some…

Algebraic Topology · Mathematics 2016-02-01 Soumen Sarkar

A difference Lie group is a Lie group equipped with a difference operator, equivalently a crossed homomorphism with respect to the adjoint action. In this paper, first we introduce the notion of a representation of a difference Lie group,…

Rings and Algebras · Mathematics 2024-03-25 Jun Jiang , Yunnan Li , Yunhe Sheng

We construct an equivariant algebraic cobordism theory for schemes with an action by a linear algebraic group over a field of characteristic zero.

Algebraic Geometry · Mathematics 2011-11-08 Jeremiah Heller , Jose Malagon-Lopez

We provide a partial answer to a question of Ekholm, Honda, and K\'alm\'an about the relationship between Khovanov homology and decomposable Lagrangian cobordisms. We also utilize previously defined filtered invariants to give obstructions…

Geometric Topology · Mathematics 2025-12-05 Gage Martin , Ina Petkova , Zachary Winkeler

We construct an infinite family of homology theories of framed links in thickened surfaces, as well as a homology theory whose graded Euler characteristic is exactly the Kauffman bracket of the link in the surface. Both theories are based…

Geometric Topology · Mathematics 2008-11-03 Jeffrey Boerner