proposition: Corollary ℚhalf : forall q t e, t↓e ⊩ ℚ q -> (divℚ @ t @ Qq (1+1))↓e ⊩ ℚ (q/(1+1)).
proof: Proof. intros. apply divℚ_realizer. ok. apply Qq_realizer. Qed.
imports: QArith ClassicalRealizability.Qcabs ClassicalRealizability.Qcminmax ClassicalRealizability.Kbase