essentially undecidable造句

例句与造句

1. In fact, every consistent extension will be essentially undecidable.
2. The theory of fields is undecidable but not essentially undecidable.
3. This proof is often extended to show that systems such as Peano arithmetic are essentially undecidable ( see Kleene 1967, p . 274 ).
4. A consistent theory that has the property that every consistent extension is undecidable is said to be "'essentially undecidable " '.
5. Robinson arithmetic is known to be essentially undecidable, and thus every consistent theory that includes or interprets Robinson arithmetic is also ( essentially ) undecidable.
6. It's difficult to find essentially undecidable in a sentence. 用essentially undecidable造句挺难的
7. Abstractions can prove useful when dealing with computer programs, because non-trivial properties of computer programs are essentially undecidable ( see Rice's theorem ).
8. I think you have misread the thing about random completions; the result of Jockusch and Soare that I think Levin is referring to does not apply to PA, but rather to some specially constructed essentially undecidable theories.
9. These fragments of "'Q "'remain undecidable, but they are no longer essentially undecidable : they have consistent decidable extensions, as well as uninteresting models ( i . e ., models which are not end-extensions of the standard natural numbers ).