There is No Fat Orbit
نویسندگان
چکیده
We give a proof of a theorem of Harrington that there is no orbit of the lattice of recursively enumerable sets containing elements of each nonzero recursively enumerable degree. We also establish some degree theoretical extensions.
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ورودعنوان ژورنال:
- Ann. Pure Appl. Logic
دوره 80 شماره
صفحات -
تاریخ انتشار 1996