Quasi–minimal surfaces of pseudo–Riemannian space forms with positive relative nullity
Journal of Mathematical Analysis and Applications, 2020 In this paper, we consider surfaces in 4–dimensional pseudo–Riemannian space–forms with index 2. First, we obtain some of geometrical properties of such surfaces considering their relative null space.
Burcu Bektaş Demirci +1 more
exaly +2 more sources
The relative nullity of complex submanifolds and the Gauss map [PDF]
, 2016 We give a short and geometric proof, based on Jacobi fields, of a theorem of K. Abe that asserts that the relative index of nullity is trivial for complete non-totally geodesic complex projective submanifolds. Using this idea we prove a splitting theorem
Olmos, C. +3 more
core +1 more source
A Berger type normal holonomy theorem for complex submanifolds [PDF]
, 2010 We prove a kind of Berger-Simons' Theorem for the normal holonomy group of a complex submanifold of the projective ...
Antonio J. Di Scala +5 more
core +1 more source
Contact co-isotropic CR submanifolds of a pseudo-Sasakian manifold
International 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
On the higher order mean curvatures of spacelike hypersurfaces in pp-wave spacetimes
, 2023 ct. We study some geometric aspects of the higher order mean curvatures (or, more simply, the so-called r-th mean curvatures) of a spacelike hypersurface immersed in a pp-wave spacetime, namely, in a connected Lorentzian manifold admitting a parallel ...
de Lacerda José H. H. +3 more
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La aparente corrección parcial del control de transparencia a propósito de la STJUE de 21 de diciembre de 2016 = The apparent partial correction of the transparency control regarding the CJEU judgement of 21st december 2016 [PDF]
, 2017 Con la STJUE de 21 de diciembre de 2016, Gutiérrez Naranjo y otros, C-154/15, C-307/15 y C-308/15, se pone al descubierto la defectuosa interpretación llevada a cabo en la creación jurisprudencial del control de transparencia.
Domínguez Yamasaki, María Isabel +2 more
core +1 more source
Sanitary conditions of the dental assistence in Cariacica city, Espirito Santo State
, 2021 Milhares de pessoas procuram serviços odontológicos cotidianamente e nesses serviços são realizados procedimentos que podem expor as pessoas a riscos variados.
Bortolotti, Márcia Gabriella Lino de Barros
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ON THE TOTALLY GEODESIC SPACELIKE HYPERSURFACES IN CONFORMALLY STATIONARY SPACETIMES [PDF]
We study complete noncompact spacelike hypersurfaces immersed into conformally stationary spacetimes, equipped with either one or two conformal vector fields.
L. Velásquez, Marco Antonio +1 more
core +2 more sources
A sharp estimate for the index of relative nullity
Matemática 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
Salāmat-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
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