&^(expr1, expr2, ...)
expr1 &^ expr2 &^ ...
expr, expr, ...
The operator &^ represents the wedge product of differential forms.
Elementary simplifications are done on wedge products. For example, if a is a form of odd degree, then &^(a, a) is simplified to 0.
The operator &^ will distribute over + whenever possible. The preferred representation of &^ is a sum of wedge products. Otherwise, it may be necessary to apply expand, then simpform to an expression to reduce it to simplest form.
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