Journal of the
Korean Mathematical Society
JKMS

ISSN(Print) 0304-9914 ISSN(Online) 2234-3008

Article

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J. Korean Math. Soc. 2018; 55(3): 553-574

Online first article March 22, 2018      Printed May 1, 2018

https://doi.org/10.4134/JKMS.j170251

Copyright © The Korean Mathematical Society.

Harmonic maps and biharmonic maps on principal bundles and warped products

Hajime Urakawa

Tohoku University

Abstract

In this paper, we study harmonic maps and biharmonic maps on the principal $G$-bundle in Kobayashi and Nomizu \cite{KN} and also the warped product $P=M\times_f F$ for a $C^{\infty}(M)$ function $f$ on $M$ studied by Bishop and O'Neill \cite{BO}, and Ejiri \cite{Ej}.

Keywords: principal $G$ bundle, Ricci curvature, harmonic map, biharmonic map, warped product

MSC numbers: Primary 58E20; Secondary 53C43