added "<*mlex*>" which lexicographically combines a measure function with a relation
added "<*mlex*>" which lexicographically combines a measure function with a relation

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