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33 (*i $Id: SplitRmult.v,v 1.7 2003/11/29 17:28:40 herbelin Exp $ i*)
35 (*i Lemma mult_non_zero :(r1,r2:R)``r1<>0`` /\ ``r2<>0`` -> ``r1*r2<>0``. i*)
37 include "Reals/Rbase.ma".
42 | |- ((?X1 * ?X2)%R <> 0%R) =>
43 apply Rmult_integral_contrapositive; split; try split_Rmult