Merge branch 'master' of gitlab.math.univ-paris-diderot.fr:cauderlier/math_transfer

Conflicts:
	interop/arith/Makefile
	interop/arith/natural_coq.fcl
	interop/arith/natural_hol.fcl

interop/arith/natural_hol.fcl

@@ -21,10 +21,10 @@ let hsucc (n : hnat) = internal hnat
   | dedukti -> {* natural__div__full.Number_2ENatural_2Esuc n *};;
 
 theorem hol_induction :
-  all p : hnat -> prop,
-        (p(hzero) /\ (all n : hnat, p(n) -> p(hsucc(n)))) ->
-        (all n : hnat, p(n))
-  proof = dedukti proof {* natural__div__full.thm_3723. *};;
+  all p : hnat -> bool,
+      (p(hzero) /\ (all n : hnat, p(n) -> p(hsucc(n)))) ->
+      (all n : hnat, p(n))
+proof = dedukti proof {* natural__div__full.thm_3723. *};;
 
 species HolNatDecl =
   inherit NatDecl;