David Marker. Degrees of models of true arithmetic. Proceedings of the Herbrand Symposium, Logic Colloquium '81, Proceedings of the Herbrand Symposium held in Marseilles, France, July 1981, edited by J. Stern, Studies in logic and the foundations of mathematics, vol. 107, North-Holland Publishing Company, Amsterdam, New York, and Oxford, 1982, pp. 233–242. - Julia Knight, Alistair H. Lachlan, and Robert

Abstract

David Marker. Degrees of models of true arithmetic. Proceedings of the Herbrand Symposium, Logic Colloquium '81, Proceedings of the Herbrand Symposium held in Marseilles, France, July 1981, edited by J. Stern, Studies in logic and the foundations of mathematics, vol. 107, North-Holland Publishing Company, Amsterdam, New York, and Oxford, 1982, pp. 233–242. - Julia Knight, Alistair H. Lachlan, and Robert I. Soare. Two theorems on degrees of models of true arithmetic. The journal of symbolic logic, vol. 49 (1984), pp. 425–436. - Volume 52 Issue 2