KASH3 Ref - IsIntegral

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| ### Function IsIntegral ( elt-ids^int/ord^fun I ) -> elt-alg^boo ### Description True iff the fractional ideal I is integral. ### Examples 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; IsIntegral(x_I); IsIntegral(1/x_I);
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