Carl G. JockuschJr., and David B. Posner. Double jumps of minimal degrees. The journal of symbolic logic, vol. 43 no. 4 (for 1978, pub. 1979), pp. 715–724. - Carl G. JockuschJr., and David B. Posner. Automorphism bases for degrees of unsotvability. Israel journal of mathematics, vol. 40 (1981), pp. 150–164. - Richard L. Epstein. Initial segments of degrees below 0′. Memoirs of the American Mathematical Society, no. 241. American Mathematical Society, Providence1981, vi + 102 pp. - Richard A. Shore. The theory of the degrees below 0′. The journal of the London Mathematical Society, ser. 2 vol. 24 (1981), pp. 1–14.

M. Lerman

doi:10.2307/2274245

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Carl G. JockuschJr., and David B. Posner. Double jumps of minimal degrees. The journal of symbolic logic, vol. 43 no. 4 (for 1978, pub. 1979), pp. 715–724. - Carl G. JockuschJr., and David B. Posner. Automorphism bases for degrees of unsotvability. Israel journal of mathematics, vol. 40 (1981), pp. 150–164. - Richard L. Epstein. Initial segments of degrees below 0′. Memoirs of the American Mathematical Society, no. 241. American Mathematical Society, Providence1981, vi + 102 pp. - Richard A. Shore. The theory of the degrees below 0′. The journal of the London Mathematical Society, ser. 2 vol. 24 (1981), pp. 1–14.

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Carl G. JockuschJr., and David B. Posner. Double jumps of minimal degrees. The journal of symbolic logic, vol. 43 no. 4 (for 1978, pub. 1979), pp. 715–724. - Carl G. JockuschJr., and David B. Posner. Automorphism bases for degrees of unsotvability. Israel journal of mathematics, vol. 40 (1981), pp. 150–164. - Richard L. Epstein. Initial segments of degrees below 0′. Memoirs of the American Mathematical Society, no. 241. American Mathematical Society, Providence1981, vi + 102 pp. - Richard A. Shore. The theory of the degrees below 0′. The journal of the London Mathematical Society, ser. 2 vol. 24 (1981), pp. 1–14.

To save this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Google Drive account. Find out more about saving content to Google Drive.

Carl G. JockuschJr., and David B. Posner. Double jumps of minimal degrees. The journal of symbolic logic, vol. 43 no. 4 (for 1978, pub. 1979), pp. 715–724. - Carl G. JockuschJr., and David B. Posner. Automorphism bases for degrees of unsotvability. Israel journal of mathematics, vol. 40 (1981), pp. 150–164. - Richard L. Epstein. Initial segments of degrees below 0′. Memoirs of the American Mathematical Society, no. 241. American Mathematical Society, Providence1981, vi + 102 pp. - Richard A. Shore. The theory of the degrees below 0′. The journal of the London Mathematical Society, ser. 2 vol. 24 (1981), pp. 1–14.

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