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In this paper we consider the complete biconservative surfaces in Euclidean space $\mathbb{R}^3$ and in the unit Euclidean sphere $\mathbb{S}^3$. Biconservative surfaces in 3-dimensional space forms are characterized by the fact that the…

Differential Geometry · Mathematics 2016-09-21 Simona Nistor

We consider biconservative surfaces $\left(M^2,g\right)$ in a space form $N^3(c)$, with mean curvature function $f$ satisfying $f>0$ and $\nabla f\neq 0$ at any point, and determine a certain Riemannian metric $g_r$ on $M$ such that…

Differential Geometry · Mathematics 2015-03-18 Dorel Fetcu , Simona Nistor , Cezar Oniciuc

Biconservative surfaces are surfaces with divergence-free stress-bienergy tensor. Simply connected, complete, non-$CMC$ biconservative surfaces in $3$-dimensional space forms were constructed working in extrinsic and intrinsic ways. Then,…

Differential Geometry · Mathematics 2020-08-20 Simona Nistor , Cezar Oniciuc

We study the uniqueness of complete biconservative surfaces in the Euclidean space $\mathbb{R}^3$, and prove that the only complete biconservative regular surfaces in $\mathbb{R}^3$ are either $CMC$ or certain surfaces of revolution. In…

Differential Geometry · Mathematics 2017-11-21 Simona Nistor , Cezar Oniciuc

We construct simply connected, complete, non-$CMC$ biconservative surfaces in the $3$-dimensional hyperbolic space $\mathbb{H}^3$ in an intrinsic and extrinsic way. We obtain three families of such surfaces, and, for each surface, the set…

Differential Geometry · Mathematics 2019-09-30 Simona Nistor , Cezar Oniciuc

In this article we consider PMC surfaces in complex space forms, and we study the interaction between the notions of PMC, totally real and biconservative. We first consider PMC surfaces in non-flat complex space forms and we prove that they…

Differential Geometry · Mathematics 2021-07-27 Hiba Bibi , Bang-Yen Chen , Dorel Fetcu , Cezar Oniciuc

Biconservative surfaces of Riemannian 3-space forms $N^3(\rho)$, are either constant mean curvature (CMC) surfaces or rotational linear Weingarten surfaces verifying the relation $3\kappa_1+\kappa_2=0$ between their principal curvatures…

Differential Geometry · Mathematics 2025-01-10 Stefano Montaldo , Alvaro Pampano

In this work we obtain some geometric properties of biconservative surfaces into a Riemannian manifold. In particular, we shall study the relationship between biconservative surfaces and the holomorphicity of a generalized Hopf function.…

Differential Geometry · Mathematics 2014-06-27 S. Montaldo , C. Oniciuc , A. Ratto

We consider biconservative surfaces in Sol3, find their local equations, and then show that all biharmonic surfaces in this space are minimal.

Differential Geometry · Mathematics 2024-04-30 Dorel Fetcu

We present some general properties of biharmonic and biconservative submanifolds and then survey recent results on such hypersurfaces in space forms. We also propose an alternative version for a well-known result of Nomizu and Smyth for…

Differential Geometry · Mathematics 2021-02-02 Dorel Fetcu , Cezar Oniciuc

We classify non-minimal biconservative surfaces with parallel mean curvature vector field in $\mathbb{S}^n\times\mathbb{R}$ and $\mathbb{H}^n\times\mathbb{R}$. When these surfaces do not lie in $\mathbb{S}^n$ or $\mathbb{H}^n$ and they are…

Differential Geometry · Mathematics 2014-08-26 Dorel Fetcu , Cezar Oniciuc , Ana Lucia Pinheiro

We introduce the notion of biconservative hypersurfaces, that is hypersurfaces with conservative stress-energy tensor with respect to the bienergy. We give the (local) classification of biconservative surfaces in 3-dimensional space forms.

Differential Geometry · Mathematics 2012-09-12 R. Caddeo , S. Montaldo , C. Oniciuc , P. Piu

Biconservative hypersurfaces are hypersurfaces with conservative stress-energy tensor with respect to the bienergy functional, and form a geometrically interesting family which includes that of biharmonic hypersurfaces. In this paper we…

Differential Geometry · Mathematics 2016-09-15 Stefano Montaldo , Irene I. Onnis , Apoena Passos Passamani

In the study of immersed surfaces of constant positive extrinsic curvature in space-forms, it is natural to substitute completeness for a weaker property, which we here call quasicompleteness. We determine the global geometry of such…

Differential Geometry · Mathematics 2024-02-28 Graham Smith

Biconservative submanifolds arise as a natural relaxation of the biharmonic condition and play an important role in the submanifold theory. In this paper, we study non-CMC biconservative surfaces with parallel normalized mean curvature…

Differential Geometry · Mathematics 2026-05-22 Simona Nistor , Mihaela Rusu

In this paper, we study biconservative surfaces with parallel normalized mean curvature vector field ($PNMC$) in the $4$-dimensional unit Euclidean sphere $\mathbb{S}^4$. First, we study the existence and uniqueness of such surfaces. We…

Differential Geometry · Mathematics 2022-11-16 Simona Nistor , Cezar Oniciuc , Nurettin Cenk Turgay , Rüya Yeğin Şen

We find the explicit local equations of biconservative surfaces with non-constant mean curvature in $\mathbb{S}^2\times\mathbb{R}$ and $\mathbb{H}^2\times\mathbb{R}$, when the gradient of the mean curvature function is a principal…

Differential Geometry · Mathematics 2025-05-26 Dorel Fetcu

In this paper, we study biconservative surfaces with parallel normalized mean curvature vector in $\mathbb{E}^4$. We obtain complete local classification in $\mathbb{E}^4$ for a biconservative PNMCV surface. We also give an example to show…

Differential Geometry · Mathematics 2017-05-23 Rüya Yeğin Şen , Nurettin Cenk Turgay

Biconservative hypersurfaces are hypersurfaces which have conservative stress-energy tensor with respect to the bienergy, containing all minimal and constant mean curvature hypersurfaces. The purpose of this paper is to study biconservative…

Differential Geometry · Mathematics 2021-10-08 Yu Fu , Min-Chun Hong , Dan Yang , Xin Zhan

This paper is devoted to the study of the global properties of harmonically immersed Riemann surfaces in $\mathbb{R}^3.$ We focus on the geometry of complete harmonic immersions with quasiconformal Gauss map, and in particular, of those…

Differential Geometry · Mathematics 2011-07-04 Antonio Alarcon , Francisco J. Lopez
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