Algebra and Logic

, Volume 22, Issue 2, pp 169–171 | Cite as

A conjecture of ershov for a relative hierarchy fails near o'

  • J. Mohrherr


Mathematical Logic Relative Hierarchy 
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Literature cited

  1. 1.
    R. L. Epstein, R. Haas, and R. L. Kramer, "Hierarchies of sets and degrees below 0," Lect. Notes Math.,859, 32–48 (1981).Google Scholar
  2. 2.
    Yu. L. Ershov, "A hierarchy of sets, I, II, III," Algebra Logika,7, No. 1, 47–73 (1968);7, No. 4, 15–47 (1968);9, No. 1, 34–51 (1970).Google Scholar
  3. 3.
    C. G. Jockusch, Review of [1], Math. Rev. (to appear).Google Scholar

Copyright information

© Plenum Publishing Corporation 1984

Authors and Affiliations

  • J. Mohrherr
    • 1
  1. 1.University of Illinois at Chicago

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