A. Maitra and C. Ryll-Nardzewski. On the existence of two analytic non-Borel sets which are not isomorphic. Bulletin de L'Académie Polonaise des Sciences, Série des sciences mathematiques, astronomiques et physiques, vol. 18 (1970), pp. 177–178. - R. Daniel Mauldin. On nonisomorphic analytic sets. Proceedings of the American Mathematical Society, vol. 58 (1976), pp. 241–244. - Karel Hrbacek. On the complexity of analytic sets. Zeitschrift für mathematische Logik und Grundlagen der Mathematik, vol. 24 (1978), pp. 419–425. - Karel Hrbacek and Stephen G. Simpson. On Kleene degrees of analytic sets. The Kleene Symposium, Proceedings of the symposium held June 18–24, 1978 at Madison, Wisconsin, U.S.A., edited by Jon Barwise, H. Jerome Keisler, and Kenneth Kunen, Studies in logic and the foundations of mathematics, vol. 101, North-Holland Publishing Company, Amsterdam, New York, and Oxford, 1980, pp. 347–352. - Leo Harrington. Analytic determinacy and 0#. The journal of symbolic logic, vol. 43 no. 4 (for 1978, pub. 1979), pp. 685–693.
1984 ◽
Vol 49
(2)
◽
pp. 665-668