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Let R be a regular local ring. Let G be a reductive R-group scheme. A conjecture of Grothendieck and Serre predicts that a principal G-bundle over R is trivial if it is trivial over the quotient field of R. The conjecture is known when R…

Algebraic Geometry · Mathematics 2023-03-15 Roman Fedorov

We generalize Fulton's Residual Intersection Theorem for the Segre class and express the Segre classes of schemes with regularly embedded components in terms of the Chern classes of the normal bundles to the components and their…

Algebraic Geometry · Mathematics 2025-11-11 Guanxi Li

In this survey paper we present recent results obtained by Khare, Wintenberger and the author that have led to a proof of Serre's conjecture, such as existence of compatible families, modular upper bounds for universal deformation rings and…

Number Theory · Mathematics 2007-12-11 Luis Dieulefait

In this paper we give a new and simplified proof of the variational Hodge conjecture for complete intersection cycles on a hypersurface in projective space.

Algebraic Geometry · Mathematics 2023-10-10 Remke Kloosterman

We show that several statistics of the number of intersections between random eigenfunctions of general eigenvalues with a given smooth curve in flat tori are universal under various families of randomness.

Probability · Mathematics 2017-07-18 Mei-Chu Chang , Hoi Nguyen , Oanh Nguyen , Van Vu

This paper studies algebraic residual intersections in rings with Serre's condition \( S_{s} \). It demonstrates that residual intersections admit free approaches i.e. perfect subideal with the same radical. This fact leads to determining a…

Commutative Algebra · Mathematics 2025-02-13 S. Hamid Hassanzadeh

An old conjecture of Durfee 1978 bounds the ratio of two basic invariants of complex isolated complete intersection surface singularities: the Milnor number and the singularity (or geometric) genus. We give a counterexample for the case of…

Algebraic Geometry · Mathematics 2011-11-08 Dmitry Kerner , András Némethi

Using an alternate description of support varieties of pairs of modules over a complete intersection, we give several new applications of such varieties, including results for support varieties of intermediate complete intersections.…

Commutative Algebra · Mathematics 2015-09-28 Petter Andreas Bergh , David A. Jorgensen

We prove an existence theorem for jet differentials on complete intersection varieties that generalizes a theorem of S. Diverio. We also show that one can readily deduce hyperbolicity for generic complete intersections of high multidegree…

Algebraic Geometry · Mathematics 2010-10-18 Damian Brotbek

A topological interpretation of Hochster's Theta pairing of two modules on a hypersurface ring is given in terms of linking numbers. This generalizes results of M. Hochster and proves a conjecture of J. Steenbrink. As a corollary we get…

Algebraic Geometry · Mathematics 2011-12-12 Ragnar-Olaf Buchweitz , Duco van Straten

We prove a theorem on the intersection theory over a Noetherian local ring $R$, which gives a new proof of a classical theorem of Rees about degree functions. To obtain this, we define an intersection product on schemes that are proper and…

Commutative Algebra · Mathematics 2025-03-28 Steven Dale Cutkosky , Jonathan Montaño

In this paper, we show that there is a close relation between consistency in a constraint network and set intersection. A proof schema is provided as a generic way to obtain consistency properties from properties on set intersection. This…

Artificial Intelligence · Computer Science 2011-10-12 R. H. C. Yap , Y. Zhang

We generalize the Chern class relation for the transversal intersection of two nonsingular varieties to a relation for possibly singular varieties, under a 'splayedness' assumption. The relation is shown to hold for both the…

Algebraic Geometry · Mathematics 2019-08-15 Paolo Aluffi , Eleonore Faber

We explicitly characterize when the Milnor number at the origin of a polynomial or power series (over an algebraically closed field k of arbitrary characteristic) is the minimum of all polynomials with the same Newton diagram, which…

Algebraic Geometry · Mathematics 2016-12-16 Pinaki Mondal

We prove the complete intersection theorem and complete nontrivial-intersection theorem for systems of set partitions

Combinatorics · Mathematics 2023-08-10 Vladimir Blinovsky

We study a natural birational invariant for varieties over finite fields and show that its vanishing on projective space is equivalent to the Tate conjecture, the Beilinson conjecture, and the Grothendieck--Serre semi-simplicity conjecture…

Algebraic Geometry · Mathematics 2025-12-23 Samet Balkan , Stefan Schreieder

We derive a formula for the Milnor class of scheme-theoretic global complete intersections (with arbitrary singularities) in a smooth variety in terms of the Segre class of its singular scheme. In codimension one the formula recovers a…

Algebraic Geometry · Mathematics 2013-11-19 James Fullwood

In a series of papers [Pan0], [Pan1], [Pan2], [Pan3] we give a detailed and better structured proof of the Grothendieck--Serre's conjecture for semi-local regular rings containing a finite field. The outline of the proof is the same as in…

Algebraic Geometry · Mathematics 2019-03-20 Ivan Panin

We isolate conditions on the relative size of sets of natural numbers $A,B$ that guarantee a nonempty intersection $\Delta(A)\cap\Delta(B)\ne\emptyset$ of the corresponding sets of distances. Such conditions apply to a large class of zero…

Combinatorics · Mathematics 2016-09-22 Mauro Di Nasso

Among reduced Noetherian prime characteristic commutative rings, we prove that a regular ring is precisely one where finite intersection of ideals commutes with taking bracket powers. However, reducedness is essential for this equivalence.…

Commutative Algebra · Mathematics 2021-02-23 Neil Epstein