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  1. 2016

  2. Computable Families of Sets in the Ershov Hierarchy Without Principal Numberings

    Ospichev, S. S., 1 Jun 2016, In: Journal of Mathematical Sciences (United States). 215, 4, p. 529-536 8 p.

    Research output: Contribution to journal › Article › peer-review

  3. 2015

  4. Friedberg Numberings in the Ershov Hierarchy

    Ospichev, S. S., Sept 2015, In: Algebra and Logic. 54, 4, p. 283-295 13 p.

    Research output: Contribution to journal › Article › peer-review

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ID: 3440523