Redefined OUnion in a definitional manner, and proved the rules again.  Deleted the rules OUnionI/E as they were not needed.  Proved OUN_cong.  Extended OrdQuant_ss with oex_cong and defined Ord_atomize to extract rewrite rules from ALL x<i... assumptions.
Redefined OUnion in a definitional manner, and proved the
rules again.  Deleted the rules OUnionI/E as they were not needed.  Proved
OUN_cong.  Extended OrdQuant_ss with oex_cong and defined Ord_atomize to
extract rewrite rules from ALL x<i... assumptions.

MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle