Non-isolated quasi-degreesWe show that non-isolated from below 2-c.e. Q-
degrees are dense in the structure of c.e. Q-
degrees Enumeration degrees and enumerability of familesWe study the enumerability of families relative to the enumeration
degrees. It is shown that if a
Irreducible, Singular, and Contiguous Degrees© 2017, Springer Science+Business Media, LLC. We study structures of
degrees of stronger
Complements for enumeration Π1 0-degreesWe consider the question of the existence of complements for the enumeration
degrees On Degree Spectra of Topological Spaces. If a countable algebraic structure is not computably presentable then its ‘‘
degree of non