It's not clear to me what rational function fields are and the significance of normal extensions in the first place.
$Z_7(t^9)$ seems smaller than $Z_7(t)$ so it makes sense one would be contained in the other but that is where I am stuck
It's not clear to me what rational function fields are and the significance of normal extensions in the first place.
$Z_7(t^9)$ seems smaller than $Z_7(t)$ so it makes sense one would be contained in the other but that is where I am stuck