Define some manifolds.
Example 1.
Create the zero vector for the current frame.
Example 2.
Create the zero vector on the manifold M.
Example 3.
Create the zero 2-form for the current frame.
Example 4.
Create the zero type (1, 2) tensor on the manifold M.
Example 5.
Create the zero type (1, 2) tensor on the manifold E.
Example 6.
Create the zero type (2, 2) biform on the jet space of E.
Example 7.
Create the top degree form on M with coefficient exp(- x^2 - y^2).
Example 8.
Represent the Maple expression ln(x) as a degree 0 form on M.
_DG([["form", M, 0], [[[], ln(x)]]])
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