misc tuning: more concise operations on prems (without change of exceptions);
discontinue odd clone Drule.cprems_of (see also 991a3feaf270);
(* Title: HOL/MicroJava/DFA/Semilattices.thy
Author: Gerwin Klein
Copyright 2003 TUM
*)
section \<open>Semilattices\<close>
(*<*)
theory Semilattices
imports Err Opt Product Listn
begin
end
(*>*)