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We introduce the notion of even Clifford structures on Riemannian manifolds, a framework generalizing almost Hermitian and quaternion-Hermitian geometries. We give the complete classification of manifolds carrying parallel even Clifford…

Differential Geometry · Mathematics 2019-01-08 Andrei Moroianu , Uwe Semmelmann

For any compact Lie group $G$ and any $n$ we construct a smooth $G$-manifold $U_n(G)$ such that any smooth $n$-dimensional $G$-manifold can be embedded in $U_n(G)$ with a trivial normal bundle. Furthermore, we show that such embeddings are…

Algebraic Topology · Mathematics 2025-01-03 Arthur G. Wasserman

This article introduces the problem of finding intrinsic torsion varieties associated to G-structures on a fixed parallelizable Riemannian manifold. As an illustration, the intrinsic torsion varieties of orthogonal almost product structures…

Differential Geometry · Mathematics 2012-10-30 Georgi Mihaylov

We develop a degree theory for compact immersed hypersurfaces of prescribed $K$-curvature immersed in a compact, orientable Riemannian manifold, where $K$ is any elliptic curvature function. We apply this theory to count the (algebraic)…

Differential Geometry · Mathematics 2016-10-11 Harold Rosenberg , Graham Smith

We study the types of non-integrable $\mathrm{G}$-structures on Riemannian manifolds. In particular, geometric types admitting a connection with totally skew-symmetric torsion are characterized. 8-dimensional manifolds equipped with a…

Differential Geometry · Mathematics 2007-05-23 Thomas Friedrich

Following Ghomi and Tabachnikov we study topological obstructions to totally skew embeddings of a smooth manifold M in Euclidean spaces. This problem is naturally related to the question of estimating the geometric dimension of the stable…

Algebraic Topology · Mathematics 2010-11-23 Djordje Baralic , Branislav Prvulovic , Gordana Stojanovic , Sinisa Vrecica , Rade Zivaljevic

Holomorphic manifolds over Cayley-Dickson algebras are defined and their embeddings and immersions are studied.

Algebraic Geometry · Mathematics 2018-12-18 S. V. Ludkovsky

We obtain bounds on the least dimension of an affine space that can contain an $n$-dimensional submanifold without any pairs of parallel or intersecting tangent lines at distinct points. This problem is closely related to the generalized…

Differential Geometry · Mathematics 2007-05-23 M. Ghomi , S. Tabachnikov

In the present paper, we study an extended theory of statistical manifolds in application to affine differential geometry. Any smooth hypersurface $M \subset \mathbb{R}^{n+1}$ with a transverse vector field $\xi$ naturally admits a…

Differential Geometry · Mathematics 2026-05-05 Kaito Kayo

The notion of a complex tangent arises for embeddings of real manifolds into complex spaces. It is of particular interest when studying embeddings of real $n$-dimensional manifolds into $\mathbb{C}^n$. The generic topological structure of…

Complex Variables · Mathematics 2015-06-29 Ali M. Elgindi

We consider finite-dimensional Hopf algebras $u$ which admit a smooth deformation $U\to u$ by a Noetherian Hopf algebra $U$ of finite global dimension. Examples of such Hopf algebras include small quantum groups over the complex numbers,…

Representation Theory · Mathematics 2021-01-01 Cris Negron , Julia Pevtsova

We construct Riemannian manifolds with singular continuous spectrum embedded in the absolutely continuous spectrum of the Laplacian. Our manifolds are asymptotically hyperbolic with sharp curvature bounds.

Spectral Theory · Mathematics 2021-11-03 Svetlana Jitomirskaya , Wencai Liu

In this paper we describe the algebra of differential invariants for GL(n,C)-structures. This leads to classification of almost complex structures of general positions. The invariants are applied to the existence problem of…

Differential Geometry · Mathematics 2007-12-21 Boris Kruglikov

This is an exposition of results on the existence problem of $\pi_1$-injective immersed and embedded surfaces in graph-manifolds, and also of nonpositively curved metrics on graph-manifolds, obtained by different authors. The results are…

Geometric Topology · Mathematics 2007-05-23 S. Buyalo , P. Svetlov

Here we construct spaces of coinvariants for Heisenberg vertex algebras on abelian varieties and show that these globalize to twisted $\mathscr{D}$-modules on the moduli space of abelian varieties. Remarkably, we recover the standard…

Algebraic Geometry · Mathematics 2026-04-02 Nicola Tarasca

We build two embedded resolution procedures of a quasi-ordinary singularity of complex analytic hypersurface, by using toric morphisms which depend only on the characteristic monomials associated to a quasi-ordinary projection of the…

Algebraic Geometry · Mathematics 2007-05-23 Pedro Daniel Gonzalez Perez

In this paper, we study $\lambda$-submanifolds of arbitrary codimensions in Gauss spaces. These submanifolds can be seen as natural generalizations of self-shrinker and $\lambda$-hypersurfaces. Using a divergence type theorem and some…

Differential Geometry · Mathematics 2023-04-20 Doan The Hieu

We investigate a quantization problem which asks for the construction of an algebra for relative elliptic problems of pseudodifferential type associated to smooth embeddings. Specifically, we study the problem for embeddings in the category…

Differential Geometry · Mathematics 2017-10-09 Karsten Bohlen , René Schulz

We explore the embedding of Spin groups of arbitrary dimension and signature into simple superalgebras in the case of extended supersymmetry. The R-symmetry, which generically is not compact, can be chosen compact for all the cases that are…

High Energy Physics - Theory · Physics 2007-05-23 R. D'Auria , S. Ferrara , M. A. Lledo

We investigate the infinitesimal invariants of an immersed submanifold $\Sigma $ of a Klein geometry $M\cong G/H$, and in particular an invariant filtration of Lie algebroids over $\Sigma $. The invariants are derived from the logarithmic…

Differential Geometry · Mathematics 2018-06-19 Anthony D. Blaom
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