Results 221 to 230 of about 448,963 (253)

r-Tuple almost product structures

Journal of Mathematical Sciences, 2011
A generalization of an almost product structure and an almost complex structure on smooth manifolds is constructed. The set of tensor differential invariants of type (2, 1) and the set of differential 2-forms for such structures are constructed. We show how these tensor invariants can be used to solve the classification problem for Monge–Ampere ...
Alexei Kushner
exaly   +2 more sources

ALMOST r-CONTACT STRUCTURE IN A PRODUCT MANIFOLD

Demonstratio Mathematica, 1981
Gupta, V. C., Dubey, Renu
exaly   +3 more sources

Almost-structures and structures in Lorentzian manifolds. I. Almost-Hermite- and almost-product- (2×2) -structures

Journal of Mathematical Physics, 1978
We present a list of the most important almost-structures which have been found of interest in general relativity, in the null-bivectors formalism. We discusss some of the relevant properties of such almost-structures and various new or more or less known results.
Catenacci, Roberto, Salmistraro, Franco
openaire   +2 more sources

On Almost Complex Structures on Six-dimensional Products of Spheres

Journal of Mathematical Sciences, 2020
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Daurtseva, N. A., Smolentsev, N. K.
openaire   +1 more source

A class of harmonic almost-product structures

Journal of Geometry and Physics, 1994
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
exaly   +2 more sources

Manifolds with invariant semi-Riemannian almost product structure

Ukrainian Mathematical Journal, 1992
See the review in Zbl 0773.53014.
Kochubei A N
exaly   +2 more sources

ALMOST r-CONTACT HYPERBOLIC STRUCTURE IN A PRODUCT MANIFOLD

Demonstratio Mathematica, 1978
Dube, K. K., Niwas, Ram
exaly   +2 more sources

Note on the locally product and almost locally product structures [PDF]

Proceedings of the Indian Academy of Sciences - Section A, 1967
This paper is concerned with a study of some of the properties of locally product and almost locally product structures on a differentiable manifold X n of class C k . Every locally product space has certain almost locally product structures which transform the local tangent space to X n at an arbitrary point P in a set fashion: this is studied ...
exaly   +4 more sources

A PROLONGATION OF THE REAL ALMOST-PRODUCT STRUCTURE OF A DIFFERENTIABLE MANIFOLD [PDF]

Demonstratio Mathematica, 1987
It is well known that a linear operator J acting on the tangent space \(T_ x\) of a differentiable manifold V/2 at each point x satisfying the relation \(J^ 2\) \(=\) Identity defines a real G-structure of order 1 on V, the so called real almost-product structure.
exaly   +3 more sources

Lie Groups as 4-Dimensional Riemannian or Pseudo-Riemannian Almost Product Manifolds with Nonintegrable Structure

Journal of Geometry, 2008
A Lie group as a 4-dimensional pseudo-Riemannian manifold is considered. This manifold is equipped with an almost product structure and a Killing metric in two ways. In the first case Riemannian almost product manifold with nonintegrable structure is obtained, and in the second case - a pseudo-Riemannian one.
Dimitar Mekerov
exaly   +4 more sources