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We classify, up to some lattice-theoretic equivalence, all possible configurations of rational double points that can appear on a surface whose minimal resolution is a complex Enriques surface.

Algebraic Geometry · Mathematics 2021-01-07 Ichiro Shimada

In the present paper, using the technique of localization, we determine the center of the quantum Schr\"{o}dinger algebra $\S_q$ and classify simple modules with finite-dimensional weight spaces over $\S_q$, when $q$ is not a root of unity.…

Representation Theory · Mathematics 2017-04-06 Yan-an Cai , Yongsheng Cheng , Genqiang Liu

We study the projective dimensions of the restriction of functors Hom(-,X) to a contravariantly finite rigid subcategory T of a triangulated category C. We show that the projective dimension of Hom(-,X)|T is at most one if and only if there…

Representation Theory · Mathematics 2011-11-15 Alex Lasnier

Complex and real, vacuum spaces with both self-dual and anti-self-dual parts of the Weyl tensor being of the type [N] are considered. Such spaces are classified according to two criteria. The first one takes into account the properties of…

General Relativity and Quantum Cosmology · Physics 2018-06-28 Adam Chudecki

We characterize the inclusions of weighted classes of entire functions in terms of the defining weights resp. weight systems. First we treat weights defined in terms of a so-called associated weight function where the weight(system) is…

Complex Variables · Mathematics 2024-01-24 Gerhard Schindl

We develop axiomatics of highest weight categories and quasi-hereditary algebras in order to incorporate two semi-infinite situations which are in Ringel duality with each other; the underlying posets are either upper finite or lower…

Representation Theory · Mathematics 2024-07-11 Jonathan Brundan , Catharina Stroppel

We define the notion of {\em classifying space} of a topological stack and show that every topological stack \X has a classifying space X which is a topological space well-defined up to weak homotopy equivalence. Under a certain…

Algebraic Topology · Mathematics 2010-05-04 Behrang Noohi

We classify smooth complex projective varieties $X \subset \proj^N$ of dimension $2s+1$ containing a linear subspace $\Lambda$ of dimension $s$ whose normal bundle $N_{\Lambda/X}$ is numerically effective.

Algebraic Geometry · Mathematics 2015-11-04 Carla Novelli , Gianluca Occhetta

In this note we give exact formulas (and asymptotics) for the number of rational points of bounded height on weighted projective stacks over global function fields.

Number Theory · Mathematics 2024-10-29 Tristan Phillips

It is pretty well-known that toric Fano varieties of dimension k with terminal singularities correspond to convex lattice polytopes P in R^k of positive finite volume, such that intersection of P and Z^k consists of the point 0 and vertices…

Algebraic Geometry · Mathematics 2007-05-23 Alexandr Borisov

We generalize to quantum weighted projective spaces in any dimension previous results of us on K-theory and K-homology of quantum projective spaces `tout court'. For a class of such spaces, we explicitly construct families of Fredholm…

Quantum Algebra · Mathematics 2015-09-01 Francesco D'Andrea , Giovanni Landi

We prove two conjectures on weighted complete intersections and give the complete classification of threefold weighted complete intersections in weighted projective space that are canonically or anticanonically embedded.

Algebraic Geometry · Mathematics 2012-01-04 Jheng-Jie Chen , Jungkai Alfred Chen , Meng Chen

We give classifications of integral lattices which include the Barnes-Wall lattice $BW_{16}$ or laminated lattices of dimension $1 \leqslant d \leqslant 8$ and of minimum 4. Also, we give certain lattice neighboring from each lattice.…

Combinatorics · Mathematics 2009-01-26 Junichi Shigezumi

In this paper we introduce the concept of infinite pointwise dense lineability (spaceability), and provide a criterion to obtain density from mere lineability. As an application, we study the linear and topological structures within the set…

Functional Analysis · Mathematics 2023-11-14 M. C. Calderón-Moreno , P. J. Gerlach-Mena , J. A. Prado-Bassas

A weighted simplicial complex is a simplicial complex with values (called weights) on the vertices. In this paper, we consider weighted simplicial complexes with $\mathbb{R}^2$-valued weights. We study the weighted homology and the weighted…

Combinatorics · Mathematics 2021-03-25 Shiquan Ren , Chengyuan Wu

In this paper we consider various notions of positivity for distributions on complex projective manifolds. We start by analyzing distributions having big slope with respect to curve classes, obtaining characterizations of generic projective…

Algebraic Geometry · Mathematics 2018-04-27 Carolina Araujo , Stéphane Druel

We classify Q-factorial Gorenstein Fano non-degenerate complete intersection threefolds in fake weighted projective spaces.

Algebraic Geometry · Mathematics 2025-10-14 Juergen Hausen , Paul Weiss

Extending a previous result of the authors, we classify globally generated vector bundles on projective spaces with first Chern class equal to three.

Algebraic Geometry · Mathematics 2013-07-30 José Carlos Sierra , Luca Ugaglia

We define a multidimensional rearrangement, which is related to classical inequalities for functions that are monotone in each variable. We prove the main measure theoretical results of the new theory and characterize the functional…

Classical Analysis and ODEs · Mathematics 2007-05-23 Sorina Barza , Lars-Erik Persson , Javier Soria

We prove an upper bound for the number of rational points of bounded height in a weighted projective stack which lie in a given thin subset. As a consequence, we show that $100\%$ of hyperelliptic curves do not admit a prescribed on-trivial…

Number Theory · Mathematics 2026-02-06 Stephanie Chan , Daniel Loughran , Nick Rome