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Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society
ISSN 1088-6826 (e) ISSN 0002-9939 (p)
     

Harmonic maps with finite total energy

Author(s): Shiu-Yuen Cheng; Luen-Fai Tam; Tom Y.-H. Wan
Journal: Proc. Amer. Math. Soc. 124 (1996), 275-284.
MSC (1991): Primary 53C99; Secondary 31C05, 58E20
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Abstract: We will give a criteria for a nonnegative subharmonic function with finite energy on a complete manifold to be bounded. Using this we will prove that if on a complete noncompact Riemannian manifold $M$, every harmonic function with finite energy is bounded, then every harmonic map with finite total energy from $M$ into a Cartan-Hadamard manifold must also have bounded image. No assumption on the curvature of $M$ is required. As a consequence, we will generalize some of the uniqueness results on homotopic harmonic maps by Schoen and Yau.


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Additional Information:

Shiu-Yuen Cheng
Affiliation: Department of Mathematics, University of California, Los Angeles, California 90024 - Department of Mathematics, The Chinese University of Hong Kong, Shatin, Hong Kong

Luen-Fai Tam
Affiliation: Department of Mathematics, University of California, Irvine, California 92717-3875
Address at time of publication: Department of Mathematics, The Chinese University of Hong Kong, Shatin, Hong Kong
Email: ltam@math.uci.edu

Tom Y.-H. Wan
Affiliation: Department of Mathematics, The Chinese University of Hong Kong, Shatin, Hong Kong
Email: tomwan@cuhk.hk

DOI: 10.1090/S0002-9939-96-03170-X
PII: S 0002-9939(96)03170-X
Received by editor(s): July 28, 1994
Additional Notes: The first and the third authors are partially supported by Earmarked Grant, Hong Kong, and the second author is partially supported by NSF grant \#DMS9300422.
Communicated by: Peter Li
Copyright of article: Copyright 1996, American Mathematical Society


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