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The first part of this note contains a review of basic properties of the variety of lines contained in an embedded projective variety and passing through a general point. In particular we provide a detailed proof that for varieties defined…

Algebraic Geometry · Mathematics 2012-09-11 Francesco Russo

We provide an introduction to the old-standing problem of isometric immersions. We combine a historical account of its multifaceted advances, which have fascinated geometers and analysts alike, with some of the applications in the…

Differential Geometry · Mathematics 2023-10-05 Qing Han , Marta Lewicka

The paper is devoted to study of Massey products in symplectic manifolds. Theory of generalized and classical Massey products and a general construction of symplectic manifolds with nontrivial Massey products of arbitrary large order are…

Symplectic Geometry · Mathematics 2015-06-26 I. K. Babenko , I. A. Taimanov

The present paper deals with the study of warped product pointwise bi-slant submanifolds of Kenmotsu manifolds with an example. The characterization for such submanifold is also discussed. An inequality of such submanifold is obtained and…

Differential Geometry · Mathematics 2018-03-29 Shyamal Kumar Hui , Joydeb Roy , Tanumoy Pal

We observe that numerous symplectic resolutions can be expressed as intersections of twisted cotangent bundles. Additionally, their dual symplectic resolutions can be derived from intersections of dual twisted cotangent bundles. We…

Representation Theory · Mathematics 2025-10-23 Naichung Conan Leung , Yunsong Wei

The constitutive characterization of the uniformity and homogeneity of binary elastic composites is presented in terms of a combination of the material groupoids of the individual constituents. The incorporation of these two groupoids…

Mathematical Physics · Physics 2021-05-04 Marcelo Epstein

We overview the properties of non-infinitesimal deformations of G2-structures on seven-manifolds, and in particular, focus on deformations that lie in the seven-dimensional representation of G2 and are thus defined by a vector. We then…

Differential Geometry · Mathematics 2013-01-22 Sergey Grigorian

In this article, specific definitions of the Moore-Penrose inverse, Drazin inverse of the quaternion tensor and the inverse along two quaternion tensors are introduced under the T-product. Some characterizations, representations and…

Rings and Algebras · Mathematics 2022-11-08 Hongwei Jin , Peifeng Zhou , Hongjie Jiang , Xiaoji Liu

We study immersions of a hemi-slant submanifold of lcK manifolds as a warped product with the leaves of the holomorphic (respectively slant) distribution warped and establish characterisation theorems and estimations for the squared length…

General Mathematics · Mathematics 2023-01-18 Umar Mohd Khan , Viqar Azam Khan

The object of the present paper is to obtain the characterization of a warped product semi-Riemannian manifold with a special type of recurrent like structure, called super generalized recurrent. As consequence of this result we also find…

Differential Geometry · Mathematics 2015-04-14 Absos Ali Shaikh , Haradhan Kundu , Md. Showkat Ali

The following are notes on the geometry of the bidisk. In particular, we examine the properties of equidistant surfaces in the bidisk.

Differential Geometry · Mathematics 2012-06-08 Virginie Charette , Todd A. Drumm , Rosemonde Lareau-Dussault

On objects of a triangulated category with a stability condition, we construct a topology.

Algebraic Geometry · Mathematics 2007-05-23 So Okada

For an orbifold, there is a notion of an orbifold embedding, which is more general than the one of sub-orbifolds. We develop several properties of orbifold embeddings. In the case of translation groupoids, we show that such a notion is…

Geometric Topology · Mathematics 2018-05-31 Cheol-Hyun Cho , Hansol Hong , Hyung-Seok Shin

We introduce a smoothing algorithm for triangle, quadrilateral, tetrahedral and hexahedral meshes whose centerpiece is a simple geometric triangle transformation. The first part focuses on the mathematical properties of the element…

Numerical Analysis · Mathematics 2017-08-29 Dimitris Vartziotis , Doris Bohnet

Eight different refinements of trapped surfaces are proposed, of three basic types, each intended as potential stability conditions. Minimal trapped surfaces are strictly minimal with respect to the dual expansion vector. Outer trapped…

General Relativity and Quantum Cosmology · Physics 2011-03-28 Sean A. Hayward

Motivated by strong desire to understand the natural geometry of moduli spaces of hyperbolic monopoles, we introduce and study a new type of geometry: pluricomplex geometry. It is a generalisation of hypercomplex geometry: we still have a…

Differential Geometry · Mathematics 2011-04-15 Roger Bielawski , Lorenz Schwachhöfer

The new property of minimal surfaces is obtained in this article.

Differential Geometry · Mathematics 2007-05-23 Andrei Bodrenko

We report a simple rigidity theorem for certain Euler products.

Number Theory · Mathematics 2021-07-13 Shin-ya Koyama , Nobushige Kurokawa

In this paper a new intrinsic geometric characterization of the symmetric square of a curve and of the ordinary product of two curves is given. More precisely it is shown that the existence on a surface of general type S of irregularity q…

Algebraic Geometry · Mathematics 2011-03-11 Margarida Mendes Lopes , Rita Pardini , Gian Pietro Pirola

The species of finite topological spaces admits two graded bimonoid structures, recently defined by F. Fauvet, L. Foissy, and the second author. In this article, we define a doubling of this species in two different ways. We build a…

Rings and Algebras · Mathematics 2021-08-18 Mohamed Ayadi , Dominique Manchon