In the past decade there has been a significant change in the freshman/
sophomore mathematics curriculum as taught at many, if not most, of our
colleges. This has been brought about by the introduction of linear
algebra into the curriculum at the sophomore level. The advantages of
using linear algebra both in the teaching of differential equations and
in the teaching of multivariate calculus are by now widely recognized.
Several textbooks adopting this point of view are now available and have
been widely adopted. Students completing the sophomore year now have a
fair preliminary under- standing of spaces of many dimensions. It should
be apparent that courses on the junior level should draw upon and
reinforce the concepts and skills learned during the previous year.
Unfortunately, in differential geometry at least, this is usually not
the case. Textbooks directed to students at this level generally
restrict attention to 2-dimensional surfaces in 3-space rather than to
surfaces of arbitrary dimension. Although most of the recent books do
use linear algebra, it is only the algebra of 3. The student's
preliminary understanding of higher dimensions is not cultivated.