Whenever a structure with a particularly interesting computability-theoretic property is found, it is natural to ask whether similar examples can be found within well-known classe...
Denis R. Hirschfeldt, Bakhadyr Khoussainov, Richar...
An algebraic field extension of Q or Z/(p) may be regarded either as a structure in its own right, or as a subfield of its algebraic closure F (either Q or Z/(p)). We consider the ...
Andrey Frolov, Iskander Sh. Kalimullin, Russell Mi...
We investigate computability theoretic and topological properties of spaces of orders on computable orderable groups. A left order on a group G is a linear order of the domain of ...
Malgorzata A. Dabkowska, Mieczyslaw K. Dabkowski, ...
Two properties of the Co-Spectrum of the Joint Spectrum tely many abstract structures are presented - a Minimal Pair type theorem and the existence of a Quasi-Minimal degree with r...