undecidability

This was historically the first problem for which undecidability could be proven.

He used this device to prove that even in those more powerful systems, undecidability is still present.

In the middle of the twentieth century he produced a theorem on undecidability.

This is equivalent to the undecidability of the corresponding problems for lambda terms.

Specific instances cannot be given but this follows from the undecidability of the halting problem.

This work was largely on recursion theory and undecidability.

The disruptive rhetorical structure in this case turns out to be the undecidability between inside and outside worlds within the figure of metaphor.

In place of final knowledge came uncertainty, relativity, undecidability, incomputability.

That is, it should be possible to get sound answers from them-even though the abstraction may simply yield a result of undecidability.

Comments on the undecidability proof for chaos theory.

The interpretability method is often used to establish undecidability of theories.

A number of similar undecidability proofs appeared soon before and after Turing's proof:

Her more recent research has studied issues of nondeterminism and undecidability in self-assembly.

This fact has to do with the undecidability of the validity problem for FOL.

For Wai, this conceptual liability (of tautological undecidability) need not be concerning, however.

The first such set, presented by Berger and used in his proof of undecidability, required 20,426 Wang tiles.

Undecidability only implies that the particular deductive system being considered does not prove the truth or falsity of the statement.

Both incompleteness and undecidability are technical notions.

The undecidability of the up and down is mirrored by the general confusion of reflection and object.

The weaker form of the theorem can be proven from the undecidability of the halting problem as follows.

This defines a metalanguage stack of increasing capability to resolve undecidability in the autonomous lower levels.

For proving the undecidability of the word problem in groups he was awarded the Lenin Prize in 1957.

Chauvenet Prize: the 2011 winner, for his article "Undecidability in number theory"

Because of the undecidability of the Halting Problem research in this field cannot reach completeness.

The novel "works towards an affirmation of the undecidability of identity," which is explored from several angles.