src/HOL/Tools/int_factor_simprocs.ML

   let val T = fastype_of t;
       val zero = Const(@{const_name HOL.zero}, T);
       val less = Const(@{const_name HOL.less}, [T,T] ---> HOLogic.boolT);
       val pos = less $ zero $ t and neg = less $ t $ zero
       fun prove p =
-        Option.map Eq_True_elim (LinArith.lin_arith_simproc ss p)
+        Option.map Eq_True_elim (Lin_Arith.lin_arith_simproc ss p)
         handle THM _ => NONE
     in case prove pos of
          SOME th => SOME(th RS pos_th)
        | NONE => (case prove neg of
                     SOME th => SOME(th RS neg_th)