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This is a note on calculating intersection numbers on moduli spaces of curves. A codimension 3 relation among tautological classes on the moduli space of genus 4 curves is given.

Algebraic Geometry · Mathematics 2010-03-03 Stephanie Yang

We prove that a complete intersection of $c$ very general hypersurfaces of degree at least two in $N$-dimensional complex projective space is not ruled (and therefore not rational) provided that the sum of the degrees of the hypersurfaces…

Algebraic Geometry · Mathematics 2019-09-13 Lucas Braune

This article concerns two conjectures of M. P. Murthy. For Murthy's conjecture on complete intersections, the major breakthrough has still been the result proved by Mohan Kumar in 1978. In this article we improve "Mohan Kumar's bound" when…

Commutative Algebra · Mathematics 2017-12-18 Mrinal Kanti Das

It is known that the underlying spaces of all abelian quotient singularities which are embeddable as complete intersections of hypersurfaces in an affine space can be overall resolved by means of projective torus-equivariant crepant…

Algebraic Geometry · Mathematics 2007-05-23 Dimitrios I. Dais , Christian Haase , G"unter M. Ziegler

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

Combinatorics · Mathematics 2023-08-10 Vladimir Blinovsky

Using the celebrated Witten-Kontsevich theorem, we prove a recursive formula of the $n$-point functions for intersection numbers on moduli spaces of curves. It has been used to prove the Faber intersection number conjecture and motivated us…

Algebraic Geometry · Mathematics 2013-03-27 Kefeng Liu , Hao Xu

Torelli's theorem is proven by the study of the convolution product of the intersection cohomology sheaf of the thetadivisor.

Algebraic Geometry · Mathematics 2007-05-23 Rainer Weissauer

This survey discusses hyperbolicity properties of moduli stacks and generalisations of the Shafarevich Hyperbolicity Conjecture to higher dimensions. It concentrates on methods and results that relate moduli theory with recent progress in…

Algebraic Geometry · Mathematics 2011-12-21 Stefan Kebekus

We study the minimal degrees and gonalities of curves on complete intersections. We prove a classical conjecture which asserts that the degree of any curve on a general complete intersection $X \subseteq \mathbb{P}^N$ cut out by polynomials…

Algebraic Geometry · Mathematics 2024-06-19 Nathan Chen , Benjamin Church , Junyan Zhao

In this paper, we define and study Clifford quadratic complete intersections. After showing some properties of Clifford quantum polynomial algebras, we show that there is a natural one-to-one correspondence between Clifford quadratic…

Rings and Algebras · Mathematics 2023-10-17 Haigang Hu , Izuru Mori

We prove the infinitesimal Torelli theorem for general minimal complex surfaces X's with the first Chern number 3, the geometric genus 1, and the irregularity 0 which have non-trivial 3-torsion divisors. We also show that the coarse moduli…

Algebraic Geometry · Mathematics 2007-05-23 Masaaki Murakami

Let $n$ be an even natural number. We compute the periods of any $\frac{n}{2}$-dimensional complete intersection algebraic cycle inside an $n$-dimensional non-degenerated intersection of a projective simplicial toric variety. Using this…

Algebraic Geometry · Mathematics 2024-04-24 Roberto Villaflor Loyola

We investigate the logarithmic bundles associated to arrangements of hypersurfaces with a fixed degree in a smooth projective variety. We then specialize to the case when the variety is a quadric hypersurface and a multiprojective space to…

Algebraic Geometry · Mathematics 2013-12-10 Edoardo Ballico , Sukmoon Huh , Francesco Malaspina

We describe algorithms for computing the intersection numbers of divisors and of Chern classes of the Hodge bundle on the moduli spaces of stable pointed curves. We also discuss the implementations and the results obtained. There are…

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

In this paper we study the intersection theory on surfaces with abelian quotient singularities and we derive properties of quotients of weighted projective planes. We also use this theory to study weighted blow-ups in order to construct…

Algebraic Geometry · Mathematics 2018-05-04 Enrique Artal Bartolo , Jorge Martín-Morales , Jorge Ortigas-Galindo

We give a proof of the $p$-adic weight monodromy conjecture for scheme-theoretic complete intersections in projective smooth toric varieties. The strategy is based on Scholze's proof in the $\ell$-adic setting, which we adapt using…

Algebraic Geometry · Mathematics 2025-06-11 Federico Binda , Hiroki Kato , Alberto Vezzani

This paper concerns the intersection numbers of tautological classes on moduli spaces of parabolic bundles on a smooth projective curve. We show that such intersection numbers are completely determined by wall-crossing formulas, Hecke…

Algebraic Geometry · Mathematics 2025-03-13 Miguel Moreira

We introduce and begin the topological study of real rational plane curves, all of whose inflection points are real. The existence of such curves is a corollary of results in the real Schubert calculus, and their study has consequences for…

Algebraic Geometry · Mathematics 2010-03-29 Viatcheslav Kharlamov , Frank Sottile

We construct a family of canonical connections and surrounding basic theory for almost complex manifolds that are equipped with an affine connection. This framework provides a uniform approach to treating a range of geometries. In…

Differential Geometry · Mathematics 2012-08-06 A. Rod Gover , Pawel Nurowski

In this paper, we prove the Shafarevich conjecture for proper hyperbolic polycurves, which is a higher dimensional analogue of that for proper hyperbolic curves. First, we study theories of proper hyperbolic polycurves over regular schemes.…

Number Theory · Mathematics 2019-11-05 Ippei Nagamachi , Teppei Takamatsu
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