Hi All,
I have a differential form defined in 3D Cartesian Coordinates
$\mathit{{\sigma}}=\frac{x\mathit{dy}\mathit{dz}}{a}-\frac{y\mathit{dx}\mathit{dz}}{a}$
and the following map
$g:[{a}{\ast}\cos(\theta), {a}{\ast}\sin(\theta), z]$
How do I calculate the pullback $g^{\ast}(\theta,z)$ of $\sigma$ in SageMath
I've seen all the documentation of pullback in "manifold.pdf" but I am unable to apply those examples to my case.
Thanks.
