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We study generalized non-intersection probabilities for the three-dimensional Brownian loop soup at subcritical intensities. We establish the existence of generalized intersection exponents (GIE) and prove an up-to-constants estimate for…

Probability · Mathematics 2026-05-19 Yifan Gao , Ruixuan Li , Xinyi Li

The purpose of this paper is to show that for a complete intersection curve $C$ in projective space (other than a few stated exceptions), any morphism $f: C \to \mathbb{P}^r$ satisfying $\text{deg}\, f^*\mathcal{O}_{\mathbb{P}^r}(1)…

Algebraic Geometry · Mathematics 2020-07-28 James Hotchkiss , Chung Ching Lau , Brooke Ullery

We prove a first principle of preservation of multiplicity in difference geometry, paving the way for the development of a more general intersection theory. In particular, the fibres of a \sigma-finite morphism between difference curves are…

Algebraic Geometry · Mathematics 2011-12-06 Ivan Tomasic

Our main theorem characterizes the complete intersections of codimension 2 in a projective space of dimension 3 or more over an algebraically closed field of characteristic 0 as the subcanonical and self-linked subschemes. In order to prove…

Algebraic Geometry · Mathematics 2007-05-23 Davide Franco , Steven L. Kleiman , Alexandru T. Lascu

In this paper we study the Lefschetz properties of monomial complete intersections in positive characteristic. We give a complete classification of the strong Lefschetz property when the number of variables is at least three, which proves a…

Commutative Algebra · Mathematics 2019-05-07 Samuel Lundqvist , Lisa Nicklasson

If I is an ideal in a Gorenstein ring S and S/I is Cohen-Macaulay, then the same is true for any linked ideal I'. However, such statements hold for residual intersections of higher codimension only under very restrictive hypotheses, not…

Commutative Algebra · Mathematics 2021-07-19 David Eisenbud , Craig Huneke , Bernd Ulrich

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

We present an implementation of the Atiyah-Bott residue formula for $\overline{M}_{0,m}(\mathbb{P}^{n},d)$. We use this implementation to compute a large number of Gromov-Witten invariants of genus $0$, including intersection numbers of…

Algebraic Geometry · Mathematics 2022-02-15 Giosuè Muratore , Csaba Schneider

We revisit the localization formulas of cohomology intersection numbers associated to a logarithmic connection. The main contribution of this paper is threefold: we prove the localization formula of the cohomology intersection number of…

Algebraic Geometry · Mathematics 2022-12-27 Saiei-Jaeyeong Matsubara-Heo

In this paper, we obtain an explicit arithmetic intersection formula on a Hilbert modular surface between the diagonal embedding of the modular curve and a CM cycle associated to a non-biquadratic CM quartic field. This confirms a special…

Number Theory · Mathematics 2010-08-12 Tonghai Yang

In this paper we compare different notions of transversality for possible singular complex algebraic or analytic subsets of an ambient complex manifold and prove a refined intersection formula for their Chern-Schwartz-MacPherson classes. In…

Algebraic Geometry · Mathematics 2016-01-07 Joerg Schuermann

We show a residues formula for maps generically transversal to regular holomorphic distributions.

Algebraic Geometry · Mathematics 2018-10-15 Leonardo Câmara , Maurício Corrêa

This paper presents three results on F-singularities. First, we give a new proof of Eisenstein's restriction theorem for adjoint ideal sheaves, using the theory of F-singularities. Second, we show that a conjecture of Musta\c{t}\u{a} and…

Algebraic Geometry · Mathematics 2013-05-30 Shunsuke Takagi

We determine necessary conditions for ample divisors in arbitrary genus as well as for very ample divisors in genus 2 and 3. We also compute the intersection numbers $\lambda^9$ and $\lambda_{g-1}^3$ in genus 4. The latter number is…

alg-geom · Mathematics 2008-02-03 Carel Faber

This is primarily an expository note showing that earlier work of Lai on CR geometry provides a clean interpretation, in terms of a Gauss map, for an adjunction formula for embedded surfaces in an almost complex four manifold. We will see…

Differential Geometry · Mathematics 2007-05-23 Mikhail Chkhenkeli , Thomas Garrity

One of the goals of this paper is to prove that the index of intersection of two complex curves in a two-dimensional complex manifold tangent to each other at a common boundary point is positive. This is achieved via the construction of a…

Complex Variables · Mathematics 2025-11-17 S. Ivashkovych

We prove the famous Faber intersection number conjecture and other more general results by using a recursion formula of $n$-point functions for intersection numbers on moduli spaces of curves. We also present some vanishing properties of…

Algebraic Geometry · Mathematics 2011-03-24 Kefeng Liu , Hao Xu

We give a canonical partition of shifted intersecting set systems, from which one can obtain unified and elementary proofs of the Erd\H{o}s-Ko-Rado and Hilton-Milner Theorem, as well as a characterization of maximal shifted $k$-uniform…

Combinatorics · Mathematics 2022-06-28 Nguyen Trong Tuan , Nguyen Anh Thi

We study the \L ojasiewicz exponent and the log canonical threshold of ideals of $\mathcal O_n$ when restricted to generic subspaces of $\mathbb C^n$ of different dimensions. We obtain effective formulas of the resulting numbers for ideals…

Algebraic Geometry · Mathematics 2014-05-12 Carles Bivià-Ausina , Toshizumi Fukui

In this work we study the intersection properties of a finite disk system in the euclidean space. We accomplish this by utilizing subsets of spheres with varying dimensions and analyze specific points within them, referred to as poles.…

Computational Geometry · Computer Science 2024-01-12 Jesús F. Espinoza , Cynthia G. Esquer-Pérez
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