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Let $(A,\mathfrak{m})$ be an abstract complete intersection and let $P$ be a prime ideal of $A$. In [1] Avramov proved that $A_P$ is an abstract complete intersection. In this paper we give an elementary proof of this result.

Commutative Algebra · Mathematics 2019-12-23 Tony J. Puthenpurakal

We establish the exact overlaps conjecture for iterated functions systems on the real line with algebraic contractions and arbitrary translations.

Dynamical Systems · Mathematics 2020-01-15 Ariel Rapaport

We prove a Cayley-Bacharach-type theorem for points in projective space $\mathbb{P}^n$ that lie on a complete intersection of $n$ hypersurfaces. This is made possible by new bounds on the growth of the Hilbert function of almost complete…

Algebraic Geometry · Mathematics 2021-09-17 Giulio Caviglia , Alessandro De Stefani

Using ideas from the theory of tropical curves and degeneration, we prove that any Fano hypersurface (and more generally Fano complete intersections) is swept by at most quadratic rational curves.

Algebraic Geometry · Mathematics 2011-08-23 Takeo Nishinou

The asymptotic behaviour of solutions to the quantum differential equation of a Fano manifold F defines a characteristic class A_F of F, called the principal asymptotic class. Gamma conjecture of Vasily Golyshev and the present authors…

Algebraic Geometry · Mathematics 2021-06-02 Sergey Galkin , Hiroshi Iritani

We prove the geometric Bogomolov conjecture over a function field of characteristic zero.

Algebraic Geometry · Mathematics 2023-02-22 Serge Cantat , Ziyang Gao , Philipp Habegger , Junyi Xie

We prove a conjecture of Toponogov on complete convex planes, namely that such planes must contain an umbilic point, albeit at infinity. Our proof is indirect. It uses Fredholm regularity of an associated Riemann-Hilbert boundary value…

Differential Geometry · Mathematics 2024-10-01 Brendan Guilfoyle , Wilhelm Klingenberg

We generalize the classical approach of describing the infinitesimal Torelli map in terms of multiplication in a Jacobi ring to the case of quasi-smooth complete intersections in weighted projective space. As an application, we prove the…

Algebraic Geometry · Mathematics 2022-07-13 Philipp Licht

In the first part of this paper, we obtain mirror formulas for twisted genus 0 two-point Gromov-Witten (GW) invariants of projective spaces and for the genus 0 two-point GW-invariants of Fano and Calabi-Yau complete intersections. This…

Algebraic Geometry · Mathematics 2013-02-27 Alexandra Popa , Aleksey Zinger

Let $K$ be a compact convex set in $\mathbb{R}^2$ and let $\mathcal{F}_1, \mathcal{F}_2, \mathcal{F}_3$ be finite families of translates of $K$ such that $A \cap B \neq \emptyset$ for every $A \in \mathcal{F}_i$ and $B \in \mathcal{F}_j$…

Combinatorics · Mathematics 2023-06-21 Cuauhtemoc Gomez-Navarro , Edgardo Roldán-Pensado

Small codimensional embedded manifolds defined by equations of small degree are Fano and covered by lines. They are complete intersections exactly when the variety of lines through a general point is so and has the right codimension. This…

Algebraic Geometry · Mathematics 2012-09-11 Paltin Ionescu , Francesco Russo

The first examples of complete projective connections are uncovered: normal projective connections on surfaces whose geodesics are all closed and embedded are complete, as are normal projective connections induced from complete affine…

Differential Geometry · Mathematics 2007-05-23 Benjamin McKay

We show that every reductive subgroup of the automorphism group of a quasi-smooth well formed weighted complete intersection is a restriction of a subgroup in the automorphism group in the ambient weighted projective space. Also, we provide…

Algebraic Geometry · Mathematics 2023-02-08 Victor Przyjalkowski , Constantin Shramov

We propose a new definition of the elliptic genera for complete intersections, not necessarily nonsingular, in projective spaces. We also prove they coincide with the expressions obtained from Landau-Ginzburg model by an elementary…

Algebraic Geometry · Mathematics 2007-05-23 Xiaoguang Ma , Jian Zhou

For a smooth complete intersection X, we consider a general fiber \mathbb{F} of the evaluation map ev of Kontsevich moduli space \bar{M}_{0,m}(X,m)\rightarrow X^m and the forgetful functor F : \mathbb{F} \rightarrow \bar{M}_{0,m}. We prove…

Algebraic Geometry · Mathematics 2017-01-17 Xuanyu Pan

We show the existence of $(\epsilon,n)$-complements for $(\epsilon,\Rr)$-complementary projective generalized pairs of Fano type $(X,B+M)$ when either the coefficients of $B$ and $\mu_j$ belong to a finite set or the coefficients of $B$…

Algebraic Geometry · Mathematics 2020-08-18 Guodu Chen , Qingyuan Xue

In this paper, we give an explicit formula for the Futaki invariants of complete intersections. The result is new in the case where the variety is smooth or has orbifold singularities.

Differential Geometry · Mathematics 2007-05-23 Zhiqin Lu

For a smooth curve $B$ over an algebraically closed field $k$, for every $B$-flat complete intersection $X_B$ in $B\times_{\text{Spec}\ k} \mathbb{P}^n_k$ of type $(d_1,\dots,d_c)$, if the Fano index is $\geq 2$ and if…

Algebraic Geometry · Mathematics 2018-12-31 Jason Michael Starr , Zhiyu Tian , Runhong Zong

We prove a conjecture of Shafarevich about universal coverings of projective manifolds provided the fundamental group is residually finite.

Algebraic Geometry · Mathematics 2014-01-21 Robert Treger

We present natural conjectural generalizations of the `positivity and integrality of mirror maps' phenomenon, encompassing the mirror maps appearing in the Batyrev--Borisov construction of mirror Calabi--Yau complete intersections in Fano…

Number Theory · Mathematics 2026-03-27 Sophie Bleau , Nick Sheridan