Two - Quantifier Theory of the R
نویسندگان
چکیده
منابع مشابه
The ∀∃-Theory of R(≤,∨,∧) is Undecidable
The three quantifier theory of (R,≤T ), the recursively enumerable degrees under Turing reducibility, was proven undecidable by Lempp, Nies and Slaman [1998]. The two quantifier theory includes the lattice embedding problem and its decidability is a long standing open question. A negative solution to this problem seems out of reach of the standard methods of interpretation of theories because t...
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