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diff --git a/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_fsb.ma b/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_fsb.ma
index 7f754d97f..3716f67ea 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_fsb.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_fsb.ma
@@ -21,21 +21,21 @@ include "basic_2/dynamic/cnv_aaa.ma".
 
 (* Note: this is the "big tree" theorem *)
 (* Basic_2A1: uses: snv_fwd_fsb *)
-lemma cnv_fwd_fsb (a) (h):
-      ∀G,L,T. ⦃G,L⦄ ⊢ T ![a,h] → ≥[h] 𝐒⦃G,L,T⦄.
-#a #h #G #L #T #H elim (cnv_fwd_aaa … H) -H /2 width=2 by aaa_fsb/
+lemma cnv_fwd_fsb (h) (a):
+      ∀G,L,T. ⦃G,L⦄ ⊢ T ![h,a] → ≥[h] 𝐒⦃G,L,T⦄.
+#h #a #G #L #T #H elim (cnv_fwd_aaa … H) -H /2 width=2 by aaa_fsb/
 qed-.
 
 (* Forward lemmas with strongly rt-normalizing terms ************************)
 
-lemma cnv_fwd_csx (a) (h):
-      ∀G,L,T. ⦃G,L⦄ ⊢ T ![a,h] → ⦃G,L⦄ ⊢ ⬈*[h] 𝐒⦃T⦄.
-#a #h #G #L #T #H
+lemma cnv_fwd_csx (h) (a):
+      ∀G,L,T. ⦃G,L⦄ ⊢ T ![h,a] → ⦃G,L⦄ ⊢ ⬈*[h] 𝐒⦃T⦄.
+#h #a #G #L #T #H
 /3 width=2 by cnv_fwd_fsb, fsb_inv_csx/
 qed-.
 
 (* Inversion lemmas with proper parallel rst-computation for closures *******)
 
-lemma cnv_fpbg_refl_false (a) (h):
-      ∀G,L,T. ⦃G,L⦄ ⊢ T ![a,h] → ⦃G,L,T⦄ >[h] ⦃G,L,T⦄ → ⊥.
+lemma cnv_fpbg_refl_false (h) (a):
+      ∀G,L,T. ⦃G,L⦄ ⊢ T ![h,a] → ⦃G,L,T⦄ >[h] ⦃G,L,T⦄ → ⊥.
 /3 width=7 by cnv_fwd_fsb, fsb_fpbg_refl_false/ qed-.