X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frt_computation%2Ffsb_fpbg.ma;h=cd2c4124815b517af7783d98d82d5843562fd9e7;hp=07a9aad5eec9d8e0a714d1d7649c7bc85243e915;hb=d71e53021b0c17e1a00c2d623e7139c6d18069d5;hpb=f9abd21eb0d26cf9b632af4df819225be4d091e3

diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/fsb_fpbg.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/fsb_fpbg.ma
index 07a9aad5e..cd2c41248 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_computation/fsb_fpbg.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/rt_computation/fsb_fpbg.ma
@@ -64,3 +64,12 @@ lemma fsb_ind_fpbg: ∀h,o. ∀Q:relation3 genv lenv term.
 #h #o #Q #IH #G1 #L1 #T1 #H @(fsb_ind_fpbg_fpbs … H) -H
 /3 width=1 by/
 qed-.
+
+(* Inversion lemmas with proper parallel rst-computation for closures *******)
+
+lemma fsb_fpbg_refl_false (h) (o) (G) (L) (T):
+                          ≥[h,o] 𝐒⦃G, L, T⦄ → ⦃G, L, T⦄ >[h,o] ⦃G, L, T⦄ → ⊥.
+#h #o #G #L #T #H
+@(fsb_ind_fpbg … H) -G -L -T #G1 #L1 #T1 #_ #IH #H
+/2 width=5 by/
+qed-.