t; B from cotangent vectors as elements
of type D^n.  In like fashion, having defined E!A! = !A! |_| d!A!,
we can systematically attach the adjective &quot;extended&quot; or the
substantive &quot;bundle&quot; to all the constructs associated with
this full complement of 2n features.

Eventually we may want to extend our basic alphabet even further,
to allow for discussion of higher order differential expressions.
For those who want to run ahead, and would like to play through,
I submit the following gamut o