On a problem of IshmukhametovGiven a d.
c.e. degree d, consider the d.
c.e.
sets in d and the corresponding degrees
On a problem of IshmukhametovGiven a d.
c.e. degree d, consider the d.
c.e.
sets in d and the corresponding degrees
There is no low maximal d. c. e. degree - CorrigendumWe give a corrected proof of an extension of the Robinson Splitting Theorem for the d.
c.
e Q-degrees of n-C.E. sets.
sets form a true hierarchy in terms of Q-degrees, and that for any n ≥ 1 there exists a
2n-
c.e. Q