x_gf3:=FiniteField(3); x_gf3x:=PolynomialAlgebra(x_gf3); x_gf3xy:=PolynomialAlgebra(x_gf3x); x_f:=x_gf3xy.1^2+1; x_F:=FunctionField(x_f);x_O:=MaximalOrderFinite(x_F); x_I := Element(x_O,[3,1])*x_O; Basis(x_I);