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Question: wrong result working with differential forms?

Question:wrong result working with differential forms?

donielix 5 Maple
tensor differentialgeometry
June 15 2020
1


This is my notebook

 
> 

restart
> 

with(DifferentialGeometry)
> 

DGsetup([t, rho, theta, phi, `#mover(mi("θ",fontstyle = "normal"),mo("&uminus0;"))`, `#mover(mi("φ",fontstyle = "normal"),mo("&uminus0;"))`, `#mover(mi("θ",fontstyle = "normal"),mo("˜"))`, `#mover(mi("φ",fontstyle = "normal"),mo("˜"))`], M)
M > 

``
M > 

evalDG(`&w`(dt, `dρ`))

_DG([["form", M, 1], [[[1], `dρ`]]])

 (1)
M > 

evalDG(`&s`(dt, `dρ`))

_DG([["tensor", M, [["cov_bas"], []]], [[[1], `dρ`]]])

 (2)
M > 

 

 

  
> 

``

I don't understand why computing the wedge product of two differential forms gives me an output which prints the product of both. Why  don't it just return d rho ^ dt?
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