move real_isLub_unique to isLub_unique in Lubs; real_sum_of_halves to RealDef; abs_diff_less_iff to Rings
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