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We describe for any Riemannian manifold a certain infinitesimal neighbourhood of the diagonal. Semi-conformal maps are analyzed as those that preserve such neighbourhoods; harmonic maps are analyzed as those that preserve mirror image…

Differential Geometry · Mathematics 2007-05-23 Anders Kock

In this paper, we derived biharmonic equations for pseudo-Riemannian submanifolds of pseudo-Riemannian manifolds which includes the biharmonic equations for submanifolds of Riemannian manifolds as a special case. As applications, we proved…

Differential Geometry · Mathematics 2015-12-09 Yuxin Dong , Ye-Lin Ou

We study dynamics and bifurcations of 2-dimensional reversible maps having a symmetric saddle fixed point with an asymmetric pair of nontransversal homoclinic orbits (a symmetric nontransversal homoclinic figure-8). We consider…

Dynamical Systems · Mathematics 2017-11-27 A. Delshams , M. S. Gonchenko , S. V. Gonchenko , J. T Lázaro

Recently, the statistical bi-energy functional and its first variational formula were introduced by the author and H. Furuhata. The Maps satisfying the corresponding Euler-Lagrange equation are called statistical biharmonic maps. We present…

Differential Geometry · Mathematics 2025-09-08 Ryu Ueno

In this paper, we study biharmonic hypersurfaces in Einstein manifolds. Then, we determine all the biharmonic hypersurfaces in irreducible symmetric spaces of compact type which are regular orbits of commutative Hermann actions of…

Differential Geometry · Mathematics 2015-07-08 Shinji Ohno , Takashi Sakai , Hajime Urakawa

In this paper, we mainly derive monotonicity formula of generalized map using conservation law, including $\phi$-$F$ harmonic map coupled with $\phi$-$F$ symphonic map with $m$ form and potential from metric measure space, $ p $ harmonic…

Differential Geometry · Mathematics 2022-12-16 Xiangzhi Cao

A Lie group $G$ endowed with a left invariant Riemannian metric $g$ is called Riemannian Lie group. Harmonic and biharmonic maps between Riemannian manifolds is an important area of investigation. In this paper, we study different aspects…

Differential Geometry · Mathematics 2014-12-17 Mohamed Boucetta , Seddik Ouakkas

In the previous paper [GLM2018], we showed that the theory of harmonic maps between Riemannian manifolds may be discretized by introducing triangulations with vertex and edge weights on the domain manifold. In the present paper, we study…

Differential Geometry · Mathematics 2020-01-22 Jonah Gaster , Brice Loustau , Léonard Monsaingeon

For stationary harmonic maps between Riemannian manifolds, we provide a necessary and sufficient condition for the uniform interior and boundary gradient estimates in terms of the total energy of maps. We also show that if analytic target…

Differential Geometry · Mathematics 2016-09-07 Fang-Hua Lin

This article studies the smoothness of conformal mappings between two Riemannian manifolds whose metric tensors have limited regularity. We show that any bi-Lipschitz conformal mapping or $1$-quasiregular mapping between two manifolds with…

Differential Geometry · Mathematics 2016-06-06 Tony Liimatainen , Mikko Salo

We show the contractibility of spaces of invariant Riemannian metrics of positive scalar curvature on compact connected manifolds of dimension at least two, with and without boundary and equipped with compact Lie group actions. On manifolds…

Differential Geometry · Mathematics 2025-06-23 Christian Baer , Bernhard Hanke

We prove a general comparison result for homotopic finite $p$-energy $C^{1}$ $p$-harmonic maps $u,v:M\to N$ between Riemannian manifolds, assuming that $M$ is $p$-parabolic and $N$ is complete and non-positively curved. In particular, we…

Differential Geometry · Mathematics 2010-11-17 Giona Veronelli

In this note we prove the existence of two proper biharmonic maps between the Euclidean ball of dimension bigger than four and Euclidean spheres of appropriate dimensions. We will also show that, in low dimensions, both maps are unstable…

Differential Geometry · Mathematics 2024-12-03 Volker Branding

In this paper biharmonic maps between doubly warped product manifolds are studied. We show that the inclusion maps of Riemannian manifolds $B$ and $F$ into the doubly warped product $_{f}B\times_{b}F$ can not be proper biharmonic maps. Also…

Differential Geometry · Mathematics 2008-08-01 Selcen Yüksel Perktaş , Erol Kılıç

This work proves certain general orbifold compactness results for spaces of Riemannian metrics, generalizing earlier results along these lines for Einstein metrics or metrics with bounded Ricci curvature. This is then applied to prove such…

Differential Geometry · Mathematics 2007-05-23 Michael T. Anderson

We prove that polyharmonic maps of arbitrary order from complete nonparabolic Riemannian manifolds to arbitrary Riemannian manifolds must be harmonic if certain smallness and integrability conditions hold.

Differential Geometry · Mathematics 2020-12-23 Volker Branding

We prove several unique continuation results for biharmonic maps between Riemannian manifolds.

Differential Geometry · Mathematics 2019-02-20 Volker Branding , Cezar Oniciuc

f-Biharmonic maps are the extrema of the f-bienergy functional. f-biharmonic submanifolds are submanifolds whose defining isometric immersions are f-biharmonic maps. In this paper, we prove that an f-biharmonic map from a compact Riemannian…

Differential Geometry · Mathematics 2016-01-20 Ye-Lin Ou

We construct an explicit family of stable proper weak biharmonic maps from the unit ball $B^m$, $m\geq 5$, to Euclidean spheres. To the best of the authors knowledge this is the first example of a stable proper weak biharmonic map from at…

Differential Geometry · Mathematics 2025-07-10 Volker Branding , Anna Siffert

A new 8-dimensional conformal gauging avoids the unphysical size change, third order gravitational field equations, and auxiliary fields that prevent taking the conformal group as a fundamental symmetry. We give the structure equations,…

High Energy Physics - Theory · Physics 2007-05-23 James T. Wheeler