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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

The celebrated theorem of Ahlswede and Khachatrian determines the maximum size of a family of $k$-element subsets of an $n$-element set where the intersection of any two subsets has at least $r$ elements. This survey first gives a…

Combinatorics · Mathematics 2016-02-09 Gyula O. H. Katona

Using the connections among almost complete intersection schemes, arithmetically Gorenstein schemes and schemes that are union of complete intersections we give a structure theorem for arithmetically Cohen-Macaulay union of two complete…

Algebraic Geometry · Mathematics 2012-10-16 Alfio Ragusa , Giuseppe Zappala

Let A be a commutative noetherian local DG-ring with bounded cohomology. The Intersection Theorem for DG-modules is examined and some of its applications are provided. The first is to prove the DG-setting of the amplitude inequality, New…

Commutative Algebra · Mathematics 2024-05-02 Xiaoyan Yang

For the family of graded lattice ideals of dimension 1, we establish a complete intersection criterion in algebraic and geometric terms. In positive characteristic, it is shown that all ideals of this family are binomial set theoretic…

Commutative Algebra · Mathematics 2024-02-07 Hiram H. Lopez , Rafael H. Villarreal

We introduce complex intersection bodies and show that their properties and applications are similar to those of their real counterparts. In particular, we generalize Busemann's theorem to the complex case by proving that complex…

Functional Analysis · Mathematics 2014-02-26 A. Koldobsky , G. Paouris , M. Zymonopoulou

We present a novel feasibility criteria for the finite intersection of convex sets given by inequalities. This criteria allows us to easily assert the feasibility by analyzing the unconstrained minimum of a speci?fic convex function, that…

Optimization and Control · Mathematics 2020-12-18 Marius-Simion Costandin , Bogdan Gavrea , Beniamin Costandin

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

In this note we show that pattern matching in permutations is polynomial time reducible to pattern matching in set partitions. In particular, pattern matching in set partitions is NP-Complete.

Combinatorics · Mathematics 2020-09-02 Thomas Grubb

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

Tverberg's theorem says that a set with sufficiently many points in $\mathbb{R}^d$ can always be partitioned into $m$ parts so that the $(m-1)$-simplex is the (nerve) intersection pattern of the convex hulls of the parts. The main results…

Metric Geometry · Mathematics 2018-08-03 Jesús A. De Loera , Thomas A. Hogan , Deborah Oliveros , Dominic Yang

In this paper we consider permutations of sequences of partitions, obtaining a result which parallels von Neumann's theorem on permutations of dense sequences and uniformly distributed sequences of points.

Functional Analysis · Mathematics 2009-02-12 Ingrid Carbone , Aljosa Volcic

We prove in most cases that a general smooth complete intersection in the projective space has no non-trivial automorphisms.

Algebraic Geometry · Mathematics 2025-11-25 Renjie Lyu , Dingxin Zhang

We prove a version of the BKK theorem for the ring of conditions of a spherical homogeneous space $G/H$. We also introduce the notion of ring of complete intersections, firstly for a spherical homogeneous space and secondly for an arbitrary…

Algebraic Geometry · Mathematics 2020-03-23 Kiumars Kaveh , Askold G. Khovanskii

We consider shifts of a set $A\subseteq\mathbb{N}$ by elements from another set $B\subseteq\mathbb{N}$, and prove intersection properties according to the relative asymptotic size of $A$ and $B$. A consequence of our main theorem is the…

Combinatorics · Mathematics 2014-12-01 Mauro Di Nasso

Transfinite set theory including the axiom of choice supplies the following basic theorems: (1) Mappings between infinite sets can always be completed, such that at least one of the sets is exhausted. (2) The real numbers can be well…

General Mathematics · Mathematics 2007-05-23 W. Mueckenheim

In recent work of T. Cassidy and the author, a notion of complete intersection was defined for (non-commutative) regular skew polynomial rings, defining it using both algebraic and geometric tools, where the commutative definition is a…

Rings and Algebras · Mathematics 2015-03-04 Michaela Vancliff

Present article deals with trajectorial intersections in linear fractional systems ('systems'). We propose a classification of intersections of trajectories in three classes viz. trajectories intersecting at same time(EIST), trajectories…

Dynamical Systems · Mathematics 2018-08-08 Amey Deshpande , Varsha Daftardar-Gejji , Palaniappan Vellaisamy

Complete residue systems play an integral role in abstract algebra and number theory, and a description is typically found in any number theory textbook. This note provides a concise overview of complete residue systems, including a robust…

Number Theory · Mathematics 2013-05-28 Pietro Paparella

We prove that generic complete intersections associated to multiple mirror nef-partitions are all birational. This result solves a conjecture by Batyrev and Nill under some mild assumptions.

Algebraic Geometry · Mathematics 2016-05-17 Zhan Li