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A new type of sectional curvature is introduced. The notion is purely algebraic and can be located in linear algebra as well as in differential geometry.

Differential Geometry · Mathematics 2015-04-07 Barbara Opozda

Tropical geometry is a piecewise linear "shadow" of algebraic geometry. It allows for the computation of several cohomological invariants of an algebraic variety. In particular, its application to enumerative algebraic geometry led to…

Algebraic Geometry · Mathematics 2012-06-12 Florian Block

The purpose of this article is to introduce projective geometry over composition algebras : the equivalent of projective spaces and Grassmannians over them are defined. It will follow from this definition that the projective spaces are in…

Algebraic Geometry · Mathematics 2007-05-23 Pierre-Emmanuel Chaput

This paper presents an alternative approach to simplify the proofs of some important results related to polynomial mappings in Computational Algebraic Geometry such as Polynomial Implicitization, Image Closure and some properties of the…

Algebraic Geometry · Mathematics 2011-11-30 Yongbi Li

Classical contact Lie algebras are the fundamental algebraic structures on the manifolds of contact elements of configuration spaces in classical mechanics. In this paper, we determine the structure of the currently largest known category…

Quantum Algebra · Mathematics 2007-05-23 Yucai Su , Xiaoping Xu

Graph Drawing Beyond Planarity is a rapidly growing research area that classifies and studies geometric representations of non-planar graphs in terms of forbidden crossing configurations. Aim of this survey is to describe the main research…

Computational Geometry · Computer Science 2019-09-04 Walter Didimo , Giuseppe Liotta , Fabrizio Montecchiani

In this paper I consider the structure of the polylinear mapping of the free algebra over the commutative ring.

Rings and Algebras · Mathematics 2010-11-16 Aleks Kleyn

We describe the main algebraic and geometric properties of the class of algebras introduced in [arXiv:0705.1629]. We discuss their origins in symplectic geometry and associative algebra, and the notions of cohomology and representations. We…

Mathematical Physics · Physics 2008-12-18 Valentin Ovsienko

We exhibit a natural Lie algebra structure on the graded space of cyclic coinvariants of a symplectic vector space.

Rings and Algebras · Mathematics 2007-05-23 Eugene Kushnirsky , Michael Larsen

This is the first paper in a series of eight where in the first three we develop a systematic approach to the geometric algebras of multivectors and extensors, followed by five papers where those algebraic concepts are used in a novel…

Differential Geometry · Mathematics 2007-05-23 A. M. Moya , V. V. Fernandez , W. A. Rodrigues

In a previous work of the authors, a result to algorithmically compute the topology types of the level curves of an algebraic surface, is given. From this result, here we derive applications based on level curves to determine some…

Algebraic Geometry · Mathematics 2007-10-18 J. G. Alcazar , J. R. Sendra

We explore to what extent the underlying variety of a connected algebraic group or the underlying manifold of a real Lie group determines its group structure.

Algebraic Geometry · Mathematics 2022-02-02 Vladimir L. Popov

Zusmanovich gave a fundamental result on the structure of $\omega$-Lie algebras. But up to now, the classification of $\omega$-Lie algebras is still open. In this paper, we give a complete classification of $\omega$-Lie algebras over…

Rings and Algebras · Mathematics 2022-11-17 Zhiqi Chen , Junna Ni , Jianhua Yu

In this paper, some left-symmetric algebras are constructed from linear functions. They include a kind of simple left-symmetric algebras and some examples appearing in mathematical physics. Their complete classification is also given, which…

Quantum Algebra · Mathematics 2007-11-24 Chengming Bai

This a slightly expended version of my habilitation thesis, which is an overview of my research activities during the last 4 years, written in a rather informal style.

Algebraic Geometry · Mathematics 2007-05-23 Betrand Toen

It is known that the category of Lie algebras over a ring admits algebraic exponents. The aim of this paper is to show that the same is true for the category of internal Lie algebras in an additive, cocomplete, symmetric, closed, monoidal…

Category Theory · Mathematics 2020-06-15 Xabier García-Martínez , James R. A. Gray

In this paper we study the categories of braided categorical associative algebras and braided crossed modules of associative algebras and we relate these structures with the categories of braided categorical Lie algebras and braided crossed…

Category Theory · Mathematics 2017-11-27 Alejandro Fernández-Fariña , Manuel Ladra

Results describing Lie ideals and maximal finite-codimensional Lie subalgebras of the Lie algebras associated with Lie algebroids with non-singular anchor maps are presented. It is also proved that every isomorphism of such Lie algebras…

Differential Geometry · Mathematics 2007-05-23 Janusz Grabowski , Katarzyna Grabowska

In this article a new upper bounds for the multiple trigonometrical integrals are found. The method of the work based on a new method of estimation for the areas of algebraic surfaces.

Number Theory · Mathematics 2013-03-15 Ilgar Sh. Jabbarov

This paper is the second in a series of three, the aim of which is to construct algebraic geometry over a free metabelian Lie algebra $F$. For the universal closure of free metabelian Lie algebra of finite rank $r \ge 2$ over a finite field…

Algebraic Geometry · Mathematics 2007-10-23 E. Daniyarova , I. Kazachkov , V. Remeslennikov