For a smooth Harmonic Map ,

where is the Gradient, Ric is the Ricci Tensor, and Riem is the Riemann Tensor.

**References**

Eels, J. and Lemaire, L. ``A Report on Harmonic Maps.'' *Bull. London Math. Soc.* **10**, 1-68, 1978.

© 1996-9

1999-05-26