Who first proved Fermat's Last Theorem for polynomials and when? I have a proof using the Mason-Stothers Theroem, but the result is much older. Does anyone know the original proof or prover? Or at least an older proof (or prover) that doesn't use a result from the 1980's?
That is, $$ x(t)^n + y(t)^n = z(t)^n $$ has no solutions for $n \geq 3$ where $x(t), y(t)$ and $z(t)$ are non-constant relatively prime polynomials with complex (or even just integer) coefficients.