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Cohomology of Bihom-Lie superbialgebras biham - lie超双代数的上同调
IF 1.2 3区 数学 Q1 MATHEMATICS Pub Date : 2025-11-21 DOI: 10.1016/j.geomphys.2025.105714
Khaled Basdouri , Ghaith Chaabane
Recent research has extensively explored Bihom-structures. In this paper, we introduce the notion of double Bihom–Lie superbialgebras and develop a corresponding cohomology theory, defined as the total cohomology of a double complex constructed from a Bihom–Lie superalgebra and its dual. We demonstrate that the second cohomology group classifies formal deformations of Bihom–Lie superbialgebras. Furthermore, we provide explicit computations and examples in low-dimensional cases to illustrate these results.
最近的研究广泛地探索了bihomo结构。本文引入了双biham - lie超双代数的概念,并给出了相应的上同调理论,定义为由一个biham - lie超代数及其对偶构造的一个双复的全上同调。证明了第二上同群对biham - lie超双代数的形式变形进行了分类。此外,我们还提供了低维情况下的显式计算和示例来说明这些结果。
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引用次数: 0
Controllability of the rolling system of a Lorentzian manifold on Rn,1 Rn,1上洛伦兹流形滚动系统的可控性
IF 1.2 3区 数学 Q1 MATHEMATICS Pub Date : 2025-11-20 DOI: 10.1016/j.geomphys.2025.105717
Abraham Bobadilla Osses , Mauricio Godoy Molina
In this paper, we study the mechanical system associated with rolling a Lorentzian manifold (M,g) of dimension n+12 on flat Lorentzian space Mˆ=Rn,1, without slipping or twisting. Using previous results, it is known that there exists a distribution DR of rank (n+1) defined on the configuration space Q(M,Mˆ) of the rolling system, encoding the no-slip and no-twist conditions. Our objective is to study the problem of complete controllability of the control system associated with DR. The key lies in examining the holonomy group of the distribution DR and, following the approach of [7], establishing that the rolling problem is completely controllable if and only if the holonomy group of (M,g) equals SO0(n,1).
本文研究了在平面洛伦兹空间M =Rn,1上无滑移、无扭转滚动维数n+1≥2的洛伦兹流形(M,g)的力学系统。利用之前的结果可知,在滚动系统的构形空间Q(M,M})上存在一个秩为(n+1)的分布DR,它编码了无滑移和无扭转条件。我们的目标是研究与DR相关的控制系统的完全可控问题,关键在于检查分布DR的完整群,并根据[7]的方法,建立了当且仅当(M,g)的完整群等于SO0(n,1)时滚动问题是完全可控的。
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引用次数: 0
H-covering of a supermanifold 超流形的h覆盖
IF 1.2 3区 数学 Q1 MATHEMATICS Pub Date : 2025-11-20 DOI: 10.1016/j.geomphys.2025.105716
Fernando A.Z. Santamaria, Elizaveta Vishnyakova
We develop the theory of H-graded manifolds for any finitely generated abelian group, using tools from representation theory. Furthermore, we introduce and investigate the notion of H-graded coverings of supermanifolds in the case where H is a finite abelian group.
我们利用表示理论的工具,发展了任意有限生成阿贝尔群的h阶流形理论。进一步,我们引入并研究了H是有限阿贝尔群时超流形的H级覆盖的概念。
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引用次数: 0
Classification of Λ ≠ 0-vacuum algebraically special spacetimes with conformally flat I from Weyl tensor expansion 基于Weyl张量展开的具有共形平面I的0-真空代数特殊时空Λ ≠ 的分类
IF 1.2 3区 数学 Q1 MATHEMATICS Pub Date : 2025-11-19 DOI: 10.1016/j.geomphys.2025.105713
Marc Mars , Carlos Peón-Nieto
We introduce a general algebraic decomposition of Riemann-like and Weyl-like tensors with respect to a non-null vector u. We derive Gauss, Codazzi and Ricci-type identities for the Weyl tensor, that allow to relate the components of the spacetime Weyl tensor with intrinsic quantities of the hypersurfaces orthogonal to u. Restricting to the case of Λ-vacuum spacetimes (with Λ0 and any dimension) admiting a conformal compactification, we then study the behavior of the Weyl tensor near I by means of an asymptotic expansion à la Fefferman-Graham, where the first terms are explicitly computed. We use these tools to characterize four dimensional algebraically special spacetimes with locally conformally flat I, showing they match exactly the so-called Kerr-de Sitter-like class with conformally flat I, thus providing a geometric characterization of this class of spacetimes.
我们引入了类黎曼张量和类魏尔张量关于非零向量u的一般代数分解。我们导出了魏尔张量的高斯、Codazzi和ricci型等式,这些等式允许将时空魏尔张量的分量与正交于u的超曲面的内在量联系起来。限制在Λ-vacuum时空(Λ≠0和任何维度)允许共形紧化的情况下,然后,我们通过Fefferman-Graham的渐近展开式研究了Weyl张量在I附近的行为,其中第一项是显式计算的。我们使用这些工具来表征具有局部共形平坦I的四维代数特殊时空,表明它们与具有共形平坦I的所谓Kerr-de sitter类完全匹配,从而提供了这类时空的几何表征。
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引用次数: 0
Circle actions on six dimensional oriented manifolds with isolated fixed points 具有孤立不动点的六维定向流形上的圆作用
IF 1.2 3区 数学 Q1 MATHEMATICS Pub Date : 2025-11-19 DOI: 10.1016/j.geomphys.2025.105715
Donghoon Jang
To classify a group action on a manifold, the data associated with the fixed point set is essential. In this paper, we classify the fixed point data of a circle action on a 6-dimensional compact connected oriented manifold with isolated fixed points, where the fixed point data consists of the collection of signs and weights at the fixed points. We show that this fixed point data can be reduced to the empty collection by performing a sequence of operations. Specifically, we prove that one can successively take equivariant connected sums at fixed points with S6, CP3, or 6-dimensional analogues of the Hirzebruch surfaces (and their oppositely oriented counterparts), resulting in a fixed-point-free action on a compact connected oriented 6-manifold.
为了对流形上的群作用进行分类,与不动点集相关的数据是必不可少的。本文对具有孤立不动点的6维紧连通定向流形上的圆作用的不动点数据进行了分类,其中不动点数据由不动点上的符号和权的集合组成。我们表明,通过执行一系列操作,可以将此定点数据简化为空集合。具体地说,我们证明了一个人可以连续地用S6、CP3或Hirzebruch曲面的6维类似物(及其相反取向的对偶面)在不动点处取等变连接和,从而在紧连取向6流形上产生不动点的作用。
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引用次数: 0
Anti-Leibniz conformal algebras and related structures via splitting and duplication 通过分裂和复制的反莱布尼茨共形代数及其相关结构
IF 1.2 3区 数学 Q1 MATHEMATICS Pub Date : 2025-11-19 DOI: 10.1016/j.geomphys.2025.105712
Taoufik Chtioui
In this paper, we extend the concept of anti-Leibniz algebras to the conformal setting and establish an equivalent characterization for a distinguished class of such structures, called quadratic anti-Leibniz conformal algebras. We develop the representation theory of anti-Leibniz conformal algebras and explore its structural consequences. We also introduce and study O-operators on anti-Leibniz conformal algebras, which provide systematic tools for constructing new conformal algebraic structures called anti-Leibniz–dendriform conformal algebras. In addition, we investigate embedding tensors on Jacobi–Jordan conformal algebras, emphasizing their connection with anti-Leibniz conformal structures and showing how they can be used to generate new examples.
在本文中,我们将反莱布尼兹代数的概念推广到共形集合,并建立了一类特殊的结构的等价刻画,称为二次反莱布尼兹共形代数。我们发展了反莱布尼茨共形代数的表示理论,并探讨了其结构结果。我们还引入并研究了反莱布尼兹共形代数上的o算子,为构造新的共形代数结构——反莱布尼兹-树形共形代数提供了系统的工具。此外,我们研究了Jacobi-Jordan共形代数上的嵌入张量,强调了它们与反莱布尼茨共形结构的联系,并展示了如何使用它们来生成新示例。
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引用次数: 0
Some results on m-Bach soliton 关于m-巴赫孤子的一些结果
IF 1.2 3区 数学 Q1 MATHEMATICS Pub Date : 2025-11-19 DOI: 10.1016/j.geomphys.2025.105711
Prosenjit Mandal , Absos Ali Shaikh , Prince Majeed
This paper intends to the study of compact as well as non-compact m-Bach soliton. We have shown that a compact m-Bach soliton with either m>0 and σ0 or m<0 and σ0 is Bach flat. Later, in dimension 4 with non-zero Ricci curvature, we have manifested that a gradient m-Bach soliton is Bach flat. Again, we have determined the nature of the potential vector field on an m-Bach soliton as a conformal motion and acquired that such a motion becomes homothetic and the potential vector field is trivial. Also, in a 4-dimensional compact gradient m-Bach soliton with a condition we have established that the soliton vector field is Killing, and also deduced with an another condition that the soliton becomes steady. Furthermore, we have achieved that in a compact m-Bach soliton, the potential function differs from the Hodge-de Rham potential only by a constant. Finally, depending on the sign of m, it is demonstrated that an m-Bach soliton which is non-compact with a restriction on the potential vector field is either non-shrinking or non-expanding.
本文主要研究紧致和非紧致m-巴赫孤子。我们证明了m>;0且σ≥0或m<;0且σ≤0的紧致m-巴赫孤子是巴赫平坦的。随后,在具有非零里奇曲率的第4维中,我们证明了梯度m-巴赫孤子是巴赫平坦的。同样,我们已经确定了m-巴赫孤子上的势向量场作为共形运动的性质,并且得到了这样的运动是齐次的,势向量场是平凡的。此外,在四维紧致梯度m-Bach孤子中,我们建立了孤子矢量场为Killing的条件,并推导了孤子趋于稳定的另一个条件。此外,我们还发现在紧致m-巴赫孤子中,势函数与霍奇-德拉姆势只相差一个常数。最后,根据m的符号,证明了具有势向量场限制的非紧化m- bach孤子要么不收缩要么不膨胀。
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引用次数: 0
Manin triples for double Lie bialgebroids 双李双代数群的Manin三元组
IF 1.2 3区 数学 Q1 MATHEMATICS Pub Date : 2025-11-19 DOI: 10.1016/j.geomphys.2025.105710
Ana Carolina Mançur
We verify that LA-Courant algebroids provide the Manin triple framework for double Lie bialgebroids. Specifically, we establish a correspondence between double Lie bialgebroids and LA-Manin triples, i.e., LA-Courant algebroids equipped with a pair of complementary LA-Dirac structures. As an application, LA-Courant algebroids and CA-groupoids given by Drinfeld doubles are shown to correspond via integration and differentiation.
我们验证了LA-Courant代数群为双李双代数群提供了Manin三重框架。具体来说,我们建立了双李双代数群与LA-Manin三元组之间的对应关系,即具有一对互补的LA-Dirac结构的LA-Courant代数群。作为一个应用,通过积分和微分证明了由Drinfeld double给出的LA-Courant代数群和ca -群是对应的。
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引用次数: 0
Reciprocal relations for orthogonal quantum matrices 正交量子矩阵的互反关系
IF 1.2 3区 数学 Q1 MATHEMATICS Pub Date : 2025-11-19 DOI: 10.1016/j.geomphys.2025.105718
Oleg Ogievetsky , Pavel Pyatov
For the family of the orthogonal quantum matrix algebras we investigate the structure of their characteristic subalgebras — special commutative subalgebras, which for the subfamily of the reflection equation algebras appear to be central. In [35] we described three generating sets of the characteristic subalgebras of the symplectic and orthogonal quantum matrix algebras. One of these — the set of the elementary sums — is finite. In the symplectic case the elementary sums are in general algebraically independent. On the contrary, in the orthogonal case the elementary sums turn out to be dependent. We obtain a set of quadratic relations for these generators. We call these relations ‘reciprocal’ because they lie at the heart of the reciprocal (sometimes called palindromic) property of the characteristic polynomial of the orthogonal quantum matrices. Next, we resolve the reciprocal relations for the quantum orthogonal matrix algebra extended by the inverse of the quantum matrix. As an auxiliary result, we derive the commutation relations between the q-determinant of the quantum orthogonal matrix and the generators of the quantum matrix algebra, that is, the components of the quantum matrix.
对于正交量子矩阵代数族,我们研究了它们的特征子代数——特殊交换子代数的结构,它们对于反射方程代数族来说是中心的。在[35]中,我们描述了辛和正交量子矩阵代数的特征子代数的三个生成集。其中之一——初等和的集合——是有限的。在辛情况下,初等和通常是代数无关的。相反,在正交的情况下,初等和是相关的。我们得到了这些发生器的一组二次关系。我们称这些关系为“互反”,因为它们是正交量子矩阵特征多项式互反(有时称为回文)性质的核心。其次,我们解决了由量子矩阵的逆扩展的量子正交矩阵代数的互反关系。作为辅助结果,我们导出了量子正交矩阵的q行列式与量子矩阵代数的生成元(即量子矩阵的分量)之间的交换关系。
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引用次数: 0
Virasoro constraints in quantum singularity theories 量子奇点理论中的维拉索罗约束
IF 1.2 3区 数学 Q1 MATHEMATICS Pub Date : 2025-11-13 DOI: 10.1016/j.geomphys.2025.105707
Weiqiang He , Yefeng Shen
We introduce Virasoro operators for any Landau-Ginzburg pair (W,G) where W is a non-degenerate quasi-homogeneous polynomial and G is a certain group of diagonal symmetries. We propose a conjecture that the total ancestor potential of the FJRW theory of the pair (W,G) is annihilated by these Virasoro operators. We prove the conjecture in various cases, including: (1) invertible polynomials with the maximal group, (2) some two-variable polynomials with the minimal group, (3) certain Calabi-Yau polynomials with groups. We also discuss the connections among Virasoro constraints, mirror symmetry of Landau-Ginzburg models, and Landau-Ginzburg/Calabi-Yau correspondence.
对于任意Landau-Ginzburg对(W,G),我们引入了Virasoro算子,其中W是一个非退化拟齐次多项式,G是一组对角对称。我们提出了(W,G)对的FJRW理论的总祖先势被这些Virasoro算子湮灭的猜想。我们在不同的情况下证明了这个猜想,包括:(1)具有极大群的可逆多项式,(2)具有极小群的某些两变量多项式,(3)具有群的某些Calabi-Yau多项式。我们还讨论了Virasoro约束、Landau-Ginzburg模型的镜像对称性以及Landau-Ginzburg/Calabi-Yau对应关系之间的联系。
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引用次数: 0
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Journal of Geometry and Physics
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