src/HOL/W0/I.ML

 
 Equivalence of W and I.
 *)
 
 open I;
+
+val op addss = op unsafe_addss;
 
 goal thy
   "! a m s s' t n.  \
 \    (new_tv m a & new_tv m s) --> I e a m s = Ok(s',t,n) -->   \
 \    ( ? r. W e ($ s a) m = Ok(r, $ s' t, n) & s' = ($ r o s) )";