Results 11 to 20 of about 15,806 (304)
A new curvature-like tensor in an almost contact Riemannian manifold
Pracì Mìžnarodnogo Geometričnogo Centru, 2016 In a M. Prvanović’s paper [5], we can find a new curvature-like tensor in an almost Hermitian manifold.In this paper, we define a new curvature-like tensor, named contact holomorphic Riemannian, briefly (CHR), curvature tensor in an almost ...
Koji Matsumoto
doaj +2 more sources
A Note on Some Generalized Curvature Tensor
International Electronic Journal of Geometry, 2023 For any semi-Riemannian manifold (M, g) we define some generalized curvature tensor E as a linear combination of Kulkarni-Nomizu products formed by the metric tensor, the Ricci tensor and its square of given manifold. That tensor is closely related to quasi-Einstein spaces, Roter spaces and some Roter type spaces.
Ryszard Deszcz +4 more
openaire +4 more sources
Higher-curvature corrections and tensor modes [PDF]
, 2021 Higher-curvature corrections to the effective gravitational action may leave signatures in the spectrum of primordial tensor perturbations if the inflationary energy scale is sufficiently high.
Giarè, W. +5 more
core +1 more source
On curvature tensors of Hermitian manifolds [PDF]
Communications in Analysis and Geometry, 2018 This is the final version, accepted by ...
Yang, Bo, Zheng, Fangyang
openaire +2 more sources
$Q$-Curvature Tensor on $f$-Kenmotsu $3$-Manifolds
Universal Journal of Mathematics and Applications, 2022 The object of the present paper is to consider $f$-Kenmotsu $3$-manifolds fulfilling certain curvature conditions on $Q$-curvature tensor with the Schouten-van Kampen connection.
Sunil Yadav, Ahmet Yıldız
doaj +1 more source
On the geometry of sub-Riemannian manifolds equipped with a canonical quarter-symmetric connection
Дифференциальная геометрия многообразий фигур, 2023 In this article, a sub-Riemannian manifold of contact type is understood as a Riemannian manifold equipped with a regular distribution of codimension-one and by a unit structure vector field orthogonal to this distribution. This vector field is called a
S. V. Galaev
doaj +1 more source
Nonnegative curvature and conullity of the curvature tensor [PDF]
Annals of Global Analysis and Geometry, 2019 The conullity of a curvature tensor is the codimension of its kernel. We consider the cases of conullity two in any dimension and conullity three in dimension four. We show that these conditions are compatible with non-negative sectional curvature only if either the manifold is diffeomorphic to $\mathbb{R}^n$ or the universal cover is an isometric ...
openaire +3 more sources
Gap Filling of 3-D Microvascular Networks by Tensor Voting [PDF]
, 2008 We present a new algorithm which merges discontinuities in 3-D images of tubular structures presenting undesirable gaps. The application of the proposed method is mainly associated to large 3-D images of microvascular networks.
Plouraboué, Franck +2 more
core +1 more source
E-BOCHNER CURVATURE TENSOR ON ALMOST C(λ) MANIFOLDS [PDF]
, 2022 The present paper deals the study of E-Bochner curvature tensor on an almost C(λ) manifolds with the conditions Be (ξ, X).S = 0, Be (ξ, X).R = 0, R.Be (ξ, X) = 0 and Be (ξ, X).Be = 0, where R, S and Be denotes Riemannian curvature tensor, Ricci tensor ...
Gupta, Brijesh Kumar +1 more
core +1 more source
Riemann solitons on generalized weakly ω-symmetric α-cosymplectic manifolds [PDF]
Surveys in Mathematics and its Applications, 2021 Generalized quasi-conformal curvature tensor (ω-tensor) has the flavor of conformal, conharmonic, concircular, projective, m-projective, W1-curvature, W2-curvature and W4-curvature tensors.
Sabina Eyasmin +2 more
doaj