Results 91 to 100 of about 998 (174)

Book Review: Anti-invariant submanifolds [PDF]

open access: yesBulletin of the American Mathematical Society, 1979
openaire   +1 more source

A General Type of Almost Contact Manifolds

open access: yes
Among almost contact manifolds Sasakian manifolds, Kenmotsu manifolds (called also “a certain class of almost contact manifolds”) and cosymplectic manifolds have been studied by many authors.
Catalin Angelo Ioan
core   +1 more source

Biharmonic submanifolds of generalized space forms

open access: yes, 2017
International audienceWe consider biharmonic submanifolds in both generalized complex and Sasakian space forms. After giving the biharmonicity conditions for submanifolds in these spaces, we study different particular cases for which we obtain curvature ...
Upadhyay, Abhitosh, Roth, Julien
core   +1 more source

Invariant submanifolds for systems of vector fields of constant rank

open access: yes, 2016
Given a system of vector fields on a smooth manifold that spans a plane field of constant rank, we present a systematic method and an algorithm to find submanifolds that are invariant under the flows of the vector fields. We present examples of partition
ChongKyu Han   +3 more
core   +1 more source

On the canonical energy of weak gravitational fields with a cosmological constant Λ ∈ R. [PDF]

open access: yesEur Phys J C Part Fields, 2021
Chruściel PT   +3 more
europepmc   +1 more source

On invariant submanifolds of lorentzian para-sasakian manifolds

open access: yes, 2009
We consider semiparallel and 2-semiparallel invariant submanifolds of Lorentzian para-Sasakian manifolds. We show that these submanifolds are totally geodesic.
Özgür, Cihan
core  

Lightlike submanifolds of golden semi-Riemannian manifolds

open access: yes, 2019
We present lightlike submanifolds of golden semi-Riemannian manifolds. We prove that there is no radical anti-invariant lightlike submanifold of a golden semi-Riemannian manifold.
Yaşar E., (Önen) Poyraz N.
core   +1 more source

100 years of mathematical cosmology: Models, theories and problems, Part B. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci, 2022
Cotsakis S, Yefremov AP.
europepmc   +1 more source

Bounds for generalized normalized δ-Casorati curvatures for Bi-slant submanifolds in T-space forms

open access: yes, 2018
In this paper, we prove the inequality between the generalized normalized ?-Casorati curvatures and the normalized scalar curvature for the bi-slant submanifolds in T-space forms and consider the equality case of the inequality.
Mohd. Aquib
core   +1 more source

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