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Jul 6, 2011 at 1:56 comment added Quinn Culver Steve Simpson discusses the lack of natural examples of c.e. degrees between $0$ and $0'$ in this paper.
Jul 5, 2011 at 19:08 vote accept David Harris
Jul 5, 2011 at 18:04 answer added Carl Mummert timeline score: 18
Jul 5, 2011 at 16:41 history asked David Harris CC BY-SA 3.0