x_k:=FiniteField(3); x_kx:=PolynomialAlgebra(x_k); x_kxy:=PolynomialAlgebra(x_kx); x_f:=x_kxy.1^2+1; x_F:=FunctionField(x_f); x_o:=MaximalOrderFinite(x_F); x_I := Element(x_o,[2,1])*x_o; Divisor(x_I);