Results 1 to 10 of about 6,917 (187)

Multiloop algebras, iterated loop algebras and extended affine Lie algebras of nullity 2 [PDF]

open access: yes, 2014
Let M(n) be the class of all multiloop algebras of finite dimensional simple Lie algebras relative to n-tuples of commuting finite order automorphisms.
Allison, Bruce   +2 more
core   +1 more source

Submanifolds with nonparallel first normal bundle revisited [PDF]

open access: yes, 2013
In this paper, we analyze the geometric structure of an Euclidean submanifold whose osculating spaces form a nonconstant family of proper subspaces of the same dimension.
Dajczer, Marcos, Tojeiro, Ruy
core   +3 more sources

Contact co-isotropic CR submanifolds of a pseudo-Sasakian manifold

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1984
It is proved that any co-isotropic submanifold M of a pseudo-Sasakian manifold M˜(U,ξ,η˜,g˜) is a CR submanifold (such submanfolds are called CICR submanifolds) with involutive vertical distribution ν1.
Vladislav V. Goldberg, Radu Rosca
doaj   +1 more source

A geometric study of marginally trapped surfaces in space forms and Robertson-Walker spacetimes -- an overview

open access: yes, 2020
A marginally trapped surface in a spacetime is a Riemannian surface whose mean curvature vector is lightlike at every point. In this paper we give an up-to-date overview of the differential geometric study of these surfaces in Minkowski, de Sitter, anti ...
Dekimpe, Kristof, Van der Veken, Joeri
core   +1 more source

The homology of path spaces and Floer homology with conormal boundary conditions [PDF]

open access: yes, 2008
We define the Floer complex for Hamiltonian orbits on the cotangent bundle of a compact manifold satisfying non-local conormal boundary conditions. We prove that the homology of this chain complex is isomorphic to the singular homology of the natural ...
Alberto Abbond   +4 more
core   +2 more sources

A Berger type normal holonomy theorem for complex submanifolds [PDF]

open access: yes, 2011
We prove a kind of Berger-Simons' Theorem for the normal holonomy group of a complex submanifold of the projective ...
A.J. Di Scala   +27 more
core   +1 more source

Stability of Relative Equilibria in the Planar N-Vortex Problem [PDF]

open access: yes, 2013
We study the linear and nonlinear stability of relative equilibria in the planar N-vortex problem, adapting the approach of Moeckel from the corresponding problem in celestial mechanics.
Roberts, Gareth E.
core   +1 more source

Nonnegatively curved Euclidean submanifolds in codimension two

open access: yes, 2016
We provide a classification of compact Euclidean submanifolds $M^n\subset{\mathbb{R}}^{n+2}$ with nonnegative sectional curvature, for $n\ge 3$. The classification is in terms of the induced metric (including the diffeomorphism classification of the ...
Florit, Luis A., Ziller, Wolfgang
core   +1 more source

Psychometric properties of a Farsi version of the Dutch Boredom Scale Questionnaire (DUBS) in Iranian University of Medical Sciences employees

open access: yesSalāmat-i kār-i Īrān, 2020
Background and Aim: Boredom is a psychological phenomenon which is caused by many factors and it can be accompanied by undesirable effects such as reduction of professional performance. Boredom in the workplace leads to a decrease in job satisfaction and
Shahnaz Rimaz   +7 more
doaj  

A sharp estimate for the index of relative nullity

open access: yesMatemática Contemporânea, 1993
The paper announces results proofs of which can be found in the author's paper [Math. Ann. 298, No. 1, 187-192 (1994; Zbl 0810.53011)].
openaire   +2 more sources

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