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(* Formalization of the Chou, Gao and Zhang's decision procedure.          *)
(* Julien Narboux (Julien@narboux.fr)                                      *)
(* LIX/INRIA FUTURS 2004-2006                                              *)
(* University of Strasbourg 2008                                           *)
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(* Ratios elimination *)
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(** Test on_line_d in a ratio *)

Lemma test_on_line_d_12 : forall Y P Q A C D lambda,
on_line_d Y P Q lambda ->  C<>D -> parallel Y A C D ->
False ->
Y**A/C**D = 1.