rollback of local typedef until problem with type-variables can be sorted out; fixed header
rollback of local typedef until problem with type-variables can be sorted out; fixed header

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