A group of Greenwich Village residents, historic preservationists and neighborhood activists have filed an appeal challenging an Appellate Division, First Department, decision allowing New York University to proceed with a $6 billion expansion plan.

The appeals panel’s decision overturned a lower court decision in Glick v. Harvey, 103844/12, that found three parcels of land on which NYU wished to build were “implied” parkland and entitled to protection. The city parks department’s maintenance of the land was “temporary and provisional,” the panel wrote.