X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=helm%2Fsoftware%2Fcomponents%2Fng_paramodulation%2Fterms.mli;h=0146dba2c6865ef1c60b7930d9d84fe1b5aa234a;hb=7ca0a000878e864c92d94f77900bc2ca0ac143b9;hp=47295035ca47e7196beb616887c4d98cccbb7a5c;hpb=016f069da6221053873b4d505716ef1bd80f08b6;p=helm.git

diff --git a/helm/software/components/ng_paramodulation/terms.mli b/helm/software/components/ng_paramodulation/terms.mli
index 47295035c..0146dba2c 100644
--- a/helm/software/components/ng_paramodulation/terms.mli
+++ b/helm/software/components/ng_paramodulation/terms.mli
@@ -18,7 +18,7 @@ type 'a foterm =
 
 type 'a substitution = (int * 'a foterm) list
 
-type comparison = Lt | Eq | Gt | Incomparable
+type comparison = Lt | Eq | Gt | Incomparable | Invertible
 
 type rule = Superposition | Demodulation