The area element for a Surface with Riemannian Metric

is

where is the Wedge Product.

**References**

Gray, A. ``The Intuitive Idea of Area on a Surface.'' §13.2 in *Modern Differential Geometry of Curves and Surfaces.*
Boca Raton, FL: CRC Press, pp. 259-260, 1993.

© 1996-9

1999-05-25