corrected translation of integer operators,
keep argument order for n-ary symbols (conjunction, disjunction),
removed unused code
theory All_Symmetric
imports Message
begin
text {* All keys are symmetric *}
defs all_symmetric_def: "all_symmetric \<equiv> True"
lemma isSym_keys: "K \<in> symKeys"
  by (simp add: symKeys_def all_symmetric_def invKey_symmetric) 
end