EuDML | Browse

Items

All a b c d e f g h i j k l m n o p q r s t u v w x y z Other

Page 1 Next

Displaying 1 – 20 of 790

$𝒞^{0}$ -rigidity of characteristics in symplectic geometry

Emmanuel Opshtein (2009)

Annales scientifiques de l'École Normale Supérieure

The paper concerns a $𝒞^{0}$ -rigidity result for the characteristic foliations in symplectic geometry. A symplectic homeomorphism (in the sense of Eliashberg-Gromov) which preserves a smooth hypersurface also preserves its characteristic foliation.

$1$ -cocycles on the group of contactomorphisms on the supercircle $S^{1 | 3}$ generalizing the Schwarzian derivative

Boujemaa Agrebaoui, Raja Hattab (2016)

Czechoslovak Mathematical Journal

The relative cohomology $H_{diff}^{1} (𝕂 (1 | 3), 𝔬𝔰𝔭 (2, 3); 𝒟_{λ, μ} (S^{1 | 3}))$ of the contact Lie superalgebra $𝕂 (1 | 3)$ with coefficients in the space of differential operators $𝒟_{λ, μ} (S^{1 | 3})$ acting on tensor densities on $S^{1 | 3}$ , is calculated in N. Ben Fraj, I. Laraied, S. Omri (2013) and the generating $1$ -cocycles are expressed in terms of the infinitesimal super-Schwarzian derivative $1$ -cocycle $s (X_{f}) = D_{1} D_{2} D_{3} (f) α_{3}^{1 / 2}$ , $X_{f} \in 𝕂 (1 | 3)$ which is invariant with respect to the conformal subsuperalgebra $𝔬𝔰𝔭 (2, 3)$ of $𝕂 (1 | 3)$ . In this work we study the supergroup case. We give an explicit construction of $1$ -cocycles of the group...

2- II Inégalités fortes de Morse

E. Combet (1984)

Publications du Département de mathématiques (Lyon)

2 Inégalités de Morse d'après E. Witten

E. Combet (1984)

Publications du Département de mathématiques (Lyon)

3 Classification des plongements isotropes d'après A. Weinstein

D. Sondaz (1983)

Publications du Département de mathématiques (Lyon)

4-dimensional c-symplectic $S^{1}$ -manifolds with non-empty fixed point set need not be c-Hamiltonian

Akio Hattori (1998)

Banach Center Publications

The aim of this article is to answer a question posed by J. Oprea in his talk at the Workshop "Homotopy and Geometry".

A bumpy metric theorem and the Poisson relation for generic strictly convex domains.

Luchezar N. Stojanov (1990)

Mathematische Annalen

A canonical connection on sub-Riemannian contact manifolds

Michael Eastwood, Katharina Neusser (2016)

Archivum Mathematicum

We construct a canonically defined affine connection in sub-Riemannian contact geometry. Our method mimics that of the Levi-Civita connection in Riemannian geometry. We compare it with the Tanaka-Webster connection in the three-dimensional case.

A certain tensor on real hypersurfaces in a nonflat complex space form

Kazuhiro Okumura (2020)

Czechoslovak Mathematical Journal

In a nonflat complex space form (namely, a complex projective space or a complex hyperbolic space), real hypersurfaces admit an almost contact metric structure $(φ, ξ, η, g)$ induced from the ambient space. As a matter of course, many geometers have investigated real hypersurfaces in a nonflat complex space form from the viewpoint of almost contact metric geometry. On the other hand, it is known that the tensor field $h$ $...$

A characterization of harmonic foliations by the volumepreserving property of the normal geodesic flow.

Kim, Hobum (2002)

International Journal of Mathematics and Mathematical Sciences

A Class of Non-Polarizable Symplectic Manifolds.

Mark J. Gotay (1987)

Monatshefte für Mathematik

A class of tight contact structures on $Σ_{2} \times I$ .

Cofer, Tanya (2004)

Algebraic & Geometric Topology

A classification of 2-type curves in the Minkowski space $𝔼_{1}^{n}$ .

Šućurović, E. (2001)

Publications de l'Institut Mathématique. Nouvelle Série

A Classification of 2-type Curves in the Minkowski Space E1n

Emilija Šućurović (2001)

Publications de l'Institut Mathématique

A classification of contact metric 3-manifolds with constant $ξ$ -sectional and $φ$ -sectional curvatures.

Gouli-Andreou, F., Xenos, Ph.J. (2002)

Beiträge zur Algebra und Geometrie

A classification of Poisson homogeneous spaces of complex reductive Poisson-Lie groups

Eugene Karolinsky (2000)

Banach Center Publications

Let G be a complex reductive connected algebraic group equipped with the Sklyanin bracket. A classification of Poisson homogeneous G-spaces with connected isotropy subgroups is given. This result is based on Drinfeld's correspondence between Poisson homogeneous G-spaces and Lagrangian subalgebras in the double D𝖌 (here 𝖌 = Lie G). A geometric interpretation of some Poisson homogeneous G-spaces is also proposed.

A classification of the torsion tensors on almost contact manifolds with B-metric

Mancho Manev, Miroslava Ivanova (2014)

Open Mathematics

The space of the torsion (0,3)-tensors of the linear connections on almost contact manifolds with B-metric is decomposed in 15 orthogonal and invariant subspaces with respect to the action of the structure group. Three known connections, preserving the structure, are characterized regarding this classification.

A convexity theorem for Poisson actions of compact Lie groups

Hermann Flaschka, Tudor Ratiu (1996)

Annales scientifiques de l'École Normale Supérieure

A coordinatewise formulation of geometric quantization

Izu Vaisman (1979)

Annales de l'I.H.P. Physique théorique

A family of exactly solvable radial quantum systems on space of non-constant curvature with accidental degeneracy in the spectrum.

Ragnisco, Orlando, Riglioni, Danilo (2010)

SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]

Currently displaying 1 – 20 of 790

Page 1 Next