- #1
R.P.F.
- 211
- 0
Let [tex]F[/tex] be a field. Let [tex] c \in F[/tex].
I am trying to show that if
[tex] c = f^2[/tex] where [tex]f\in F[[x]][/tex], then [tex]f\in F[/tex].
So I am able to get rid of the terms with negative exponent. So now I'm left with a formal power series. Anyone knows how to do this? Thanks!
I am trying to show that if
[tex] c = f^2[/tex] where [tex]f\in F[[x]][/tex], then [tex]f\in F[/tex].
So I am able to get rid of the terms with negative exponent. So now I'm left with a formal power series. Anyone knows how to do this? Thanks!