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

Displaying 261 – 280 of 791

On Lie algebras of generators of infinitesimal symmetries of almost-cosymplectic-contact structures

Josef Janyška (2016)

Archivum Mathematicum

We study Lie algebras of generators of infinitesimal symmetries of almost-cosymplectic-contact structures of odd dimensional manifolds. The almost-cosymplectic-contact structure admits on the sheaf of pairs of 1-forms and functions the structure of a Lie algebra. We describe Lie subalgebras in this Lie algebra given by pairs generating infinitesimal symmetries of basic tensor fields given by the almost-cosymplectic-contact structure.

On Lie algebras of vector fields related to Riemannian foliations

Tomasz Rybicki (1993)

Annales Polonici Mathematici

Riemannian foliations constitute an important type of foliated structures. In this note we prove two theorems connecting the algebraic structure of Lie algebras of foliated vector fields with the smooth structure of a Riemannian foliation.

On Liouville theorem and apriori estimates for the scalar curvature equations

Chang-Shou Lin (1998)

Annali della Scuola Normale Superiore di Pisa - Classe di Scienze

On local isometric immersions into complex and quaternionic projective spaces

Hans Jakob Rivertz (2011)

Archivum Mathematicum

We will prove that if an open subset of $ℂ P^{n}$ is isometrically immersed into $ℂ P^{m}$ , with $m < (4 / 3) n - 2 / 3$ , then the image is totally geodesic. We will also prove that if an open subset of $ℍ P^{n}$ isometrically immersed into $ℍ P^{m}$ , with $m < (4 / 3) n - 5 / 6$ , then the image is totally geodesic.

On localization in holomorphic equivariant cohomology

Ugo Bruzzo, Vladimir Rubtsov (2012)

Open Mathematics

We study a holomorphic equivariant cohomology built out of the Atiyah algebroid of an equivariant holomorphic vector bundle and prove a related localization formula. This encompasses various residue formulas in complex geometry, in particular we shall show that it contains as special cases Carrell-Liebermann’s and Feng-Ma’s residue formulas, and Baum-Bott’s formula for the zeroes of a meromorphic vector field.

On LP-Sasakian manifolds.

Shaikh, A.A., Biswas, Sudipta (2004)

Bulletin of the Malaysian Mathematical Sciences Society. Second Series

On manifolds admitting metrics which are locally conformal to cosymplectic metrics: their canonical foliations, Boothby-Wang fiberings, and real homology type

Mauro Capursi, Sorin Dragomir (1993)

Colloquium Mathematicae

On Manifolds Locally Modelled on Non-Riemannian Homogeneous Spaces.

R.J. Zimmer, F. Labourie, S. Mozes (1995)

Geometric and functional analysis

On manifolds of positive Ricci curvature with large diameter.

Yukio Otsu (1991)

Mathematische Zeitschrift

On manifolds with connection

Ivan Kolář (1973)

Czechoslovak Mathematical Journal

On manifolds with nonhomogeneous factors

Manuel Cárdenas, Francisco Lasheras, Antonio Quintero, Dušan Repovš (2012)

Open Mathematics

We present simple examples of finite-dimensional connected homogeneous spaces (they are actually topological manifolds) with nonhomogeneous and nonrigid factors. In particular, we give an elementary solution of an old problem in general topology concerning homogeneous spaces.

On mappings of a manifold into a Lie group

Alois Švec (1974)

Czechoslovak Mathematical Journal

On Martin Bordemann's proof of the existence of projectively equivariant quantizations

Pierre Lecomte (2004)

Open Mathematics

The paper explains the notion of projectively equivariant quantization. It gives a sketch of Martin Bordemann's proof of the existence of projectively equivariant quantization on arbitrary manifolds.

On Maximal Geodesic-Diameter and Causality in Lorentz Manifolds.

Steven G. Harris (1982)

Mathematische Annalen

On mean periodic functions on complex hyperbolic spaces.

Volchkov, Vit.V. (2002)

Sibirskij Matematicheskij Zhurnal

On mean value theorems for small geodesic spheres in Riemannian manifolds

Masanori Kôzaki (1992)

Czechoslovak Mathematical Journal

On metrics of positive Ricci curvature conformal to $M \times 𝐑^{m}$

Juan Miguel Ruiz (2009)

Archivum Mathematicum

Let $(M^{n}, g)$ be a closed Riemannian manifold and $g_{E}$ the Euclidean metric. We show that for $m > 1$ , $(M^{n} \times 𝐑^{m}, (g + g_{E}))$ is not conformal to a positive Einstein manifold. Moreover, $(M^{n} \times 𝐑^{m}, (g + g_{E}))$ is not conformal to a Riemannian manifold of positive Ricci curvature, through a radial, integrable, smooth function, $ϕ : 𝐑^{𝐦} \to 𝐑^{+}$ , for $m > 1$ . These results are motivated by some recent questions on Yamabe constants.

On Metrics on S2 All of Whose Geodesics Are Closed.

Karsten Grove, Detlef Gromoll (1981/1982)

Inventiones mathematicae

On minimal generic submanifolds immersed in $S^{2 m + 1}$

Masahiro Kon (2001)

Colloquium Mathematicae

We give a pinching theorem for a compact minimal generic submanifold with flat normal connection immersed in an odd-dimensional sphere with standard Sasakian structure.

On minimal homothetical hypersurfaces

Lin Jiu, Huafei Sun (2007)

Colloquium Mathematicae

We give a classification of minimal homothetical hypersurfaces in an (n+1)-dimensional Euclidean space. In fact, when n ≥ 3, a minimal homothetical hypersurface is a hyperplane, a quadratic cone, a cylinder on a quadratic cone or a cylinder on a helicoid.

Currently displaying 261 – 280 of 791

Previous Page 14 Next