On cupping and Ahmad pairs

Working toward showing the decidability of the ∀∃-theory of the Σ0 2-enumeration degrees, we prove that no so-called Ahmad pair of Σ0 2-enumeration degrees can join to 0′e.

Bibliographic Details
Main Authors: Kalimullin, Iskander Sh., Lempp, Steffen, Ng, Keng Meng, Yamaleev, Mars M.
Other Authors: School of Physical and Mathematical Sciences
Format: Journal Article
Language:English
Published: 2023
Subjects:
Online Access:https://hdl.handle.net/10356/171805