Add to ORKGIn this work we prove that for every pair of computably enumerable degrees a<Q b there exists a properly 2-computably enumerable degree d such that a <Q d <Q b, a isolates d from below, and b isolates d from above. Two corollaries follow from this result. First, there exists a 2-computably enumerable degree which is Q-incomparable with any nontrivial (different from 0 and 0′) computably enumerable degree. Second, every nontrivial computably enumerable degree isolates some 2-computably enumerable degree from below and some 2-computably enumerable degree from above. © 2010 Allerton Press, Inc
© 2014, Pleiades Publishing, Ltd. We study the distinctions between Q-reducibility and m-reducibilit...
© 2014, Pleiades Publishing, Ltd. We study the distinctions between Q-reducibility and m-reducibilit...
© 2014, Pleiades Publishing, Ltd. We study the distinctions between Q-reducibility and m-reducibilit...
In this work we prove that for every pair of computably enumerable degrees a<Q b there exists a prop...
In this work we prove that for every pair of computably enumerable degrees a<Q b there exists a prop...
In this work we prove that for every pair of computably enumerable degrees a<Q b there exists a prop...
© 2020, Allerton Press, Inc. In this work we consider isolation from side in different degree struct...
We show that non-isolated from below 2-c.e. Q-degrees are dense in the structure of c.e. Q-degrees. ...
In this paper we study Q-degrees of n-computably enumerable (n-c.e.) sets. It is proved that n-c.e. ...
In this paper we study Q-degrees of n-computably enumerable (n-c.e.) sets. It is proved that n-c.e. ...
In this paper we study Q-degrees of n-computably enumerable (n-c.e.) sets. It is proved that n-c.e. ...
In this paper we study Q-degrees of n-computably enumerable (n-c.e.) sets. It is proved that n-c.e. ...
© 2017, Springer Science+Business Media, LLC. We study structures of degrees of stronger algorithmic...
© 2017, Springer Science+Business Media, LLC. We study structures of degrees of stronger algorithmic...
© 2017, Springer Science+Business Media, LLC. We study structures of degrees of stronger algorithmic...
© 2014, Pleiades Publishing, Ltd. We study the distinctions between Q-reducibility and m-reducibilit...
© 2014, Pleiades Publishing, Ltd. We study the distinctions between Q-reducibility and m-reducibilit...
© 2014, Pleiades Publishing, Ltd. We study the distinctions between Q-reducibility and m-reducibilit...
In this work we prove that for every pair of computably enumerable degrees a<Q b there exists a prop...
In this work we prove that for every pair of computably enumerable degrees a<Q b there exists a prop...
In this work we prove that for every pair of computably enumerable degrees a<Q b there exists a prop...
© 2020, Allerton Press, Inc. In this work we consider isolation from side in different degree struct...
We show that non-isolated from below 2-c.e. Q-degrees are dense in the structure of c.e. Q-degrees. ...
In this paper we study Q-degrees of n-computably enumerable (n-c.e.) sets. It is proved that n-c.e. ...
In this paper we study Q-degrees of n-computably enumerable (n-c.e.) sets. It is proved that n-c.e. ...
In this paper we study Q-degrees of n-computably enumerable (n-c.e.) sets. It is proved that n-c.e. ...
In this paper we study Q-degrees of n-computably enumerable (n-c.e.) sets. It is proved that n-c.e. ...
© 2017, Springer Science+Business Media, LLC. We study structures of degrees of stronger algorithmic...
© 2017, Springer Science+Business Media, LLC. We study structures of degrees of stronger algorithmic...
© 2017, Springer Science+Business Media, LLC. We study structures of degrees of stronger algorithmic...
© 2014, Pleiades Publishing, Ltd. We study the distinctions between Q-reducibility and m-reducibilit...
© 2014, Pleiades Publishing, Ltd. We study the distinctions between Q-reducibility and m-reducibilit...
© 2014, Pleiades Publishing, Ltd. We study the distinctions between Q-reducibility and m-reducibilit...