In computability theory, the halting problem is the problem of determining, from a description of an arbitrary computer program and an input, whether the...
53 KB (7,356 words) - 22:58, 18 May 2025
Chaitin's constant (redirect from Halting probability)
one could calculate the halting problem for all programs of a size up to N. Let the program p for which the halting problem is to be solved be N bits...
18 KB (2,319 words) - 13:06, 12 May 2025
Rice's theorem (category Undecidable problems)
for every program. The theorem generalizes the undecidability of the halting problem. It has far-reaching implications on the feasibility of static analysis...
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an algorithm that always leads to a correct yes-or-no answer. The halting problem is an example: it can be proven that there is no algorithm that correctly...
14 KB (1,921 words) - 21:06, 21 February 2025
NP-hardness (redirect from NP-Hard Problem)
that the halting problem is NP-hard but not NP-complete. For example, the Boolean satisfiability problem can be reduced to the halting problem by transforming...
9 KB (1,119 words) - 00:35, 28 April 2025
include the limits of knowledge, ignorabimus, unknown unknowns, the halting problem, and chaos theory. Nicholas Rescher provides the most recent focused...
10 KB (1,250 words) - 12:22, 3 February 2025
Busy beaver (redirect from Busy beaver problem)
computable function. This has implications in computability theory, the halting problem, and complexity theory. The concept of a busy beaver was first introduced...
66 KB (7,914 words) - 21:22, 30 April 2025
Computability (section The halting problem)
is not recursive. The halting problem is therefore called non-computable or undecidable. An extension of the halting problem is called Rice's theorem...
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termination analysis utilizes this principle in order to solve the universal halting problem for a certain class of programs. When applied to general programs,...
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Semi-Thue system (redirect from Word problem for semigroups)
decision problem is undecidable. However, that there is some Turing machine with undecidable halting problem means that the halting problem for a universal...
21 KB (3,406 words) - 18:55, 2 January 2025
Oracle machine (section Oracles and halting problems)
problem can be of any complexity class. Even undecidable problems, such as the halting problem, can be used. An oracle machine can be conceived as a Turing...
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accordingly. Some of the most important problems in mathematics are undecidable, e.g. the halting problem. The field of computational complexity theory...
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order Horn clauses. The halting problem (determining whether a Turing machine halts on a given input) and the mortality problem (determining whether it...
14 KB (1,586 words) - 03:29, 24 March 2025
Computability theory (section Automorphism problems)
the terminology. Not every set of natural numbers is computable. The halting problem, which is the set of (descriptions of) Turing machines that halt on...
54 KB (6,425 words) - 20:53, 17 February 2025
Kolmogorov complexity (section Halting problem)
Cantor's diagonal argument, Gödel's incompleteness theorem, and Turing's halting problem. In particular, no program P computing a lower bound for each text's...
58 KB (7,565 words) - 20:43, 12 April 2025
factors of n. An example of a computational problem without a solution is the Halting problem. Computational problems are one of the main objects of study in...
8 KB (984 words) - 22:51, 16 September 2024
Tag system (section The 2-tag halting problem)
^{2}t)} time. This version of the halting problem is among the simplest, most-easily described undecidable decision problems: Given an arbitrary positive integer...
17 KB (2,134 words) - 15:36, 8 November 2024
correspondence problem is an undecidable decision problem that was introduced by Emil Post in 1946. Because it is simpler than the halting problem and the...
25 KB (2,521 words) - 16:01, 20 December 2024
proof (termination proof) can never be fully automated, since the halting problem is undecidable. For example, successively searching through integers...
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input program computes a total function. It is closely related to the halting problem, which is to determine whether a given program halts for a given input...
16 KB (1,730 words) - 20:45, 14 March 2025
determining whether it is a decider is an undecidable problem. This is a variant of the halting problem, which asks for whether a Turing machine halts on...
9 KB (1,302 words) - 23:35, 10 September 2023
Mortality (computability theory) (category Undecidable problems)
computability theory, the mortality problem is a decision problem related to the halting problem. For Turing machines, the halting problem can be stated as follows:...
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not Turing-computable. For example, a machine that could solve the halting problem would be a hypercomputer; so too would one that could correctly evaluate...
30 KB (3,369 words) - 19:26, 13 May 2025
undecidability of the halting problem. It is, however, decidable for context-free grammars. Intersection non-emptiness problem Sipser, Michael (2012)...
2 KB (210 words) - 19:40, 14 December 2023
Turing machine (section The Entscheidungsproblem (the "decision problem"): Hilbert's tenth question of 1900)
whether M will eventually produce s. This is due to the fact that the halting problem is unsolvable, which has major implications for the theoretical limits...
73 KB (9,420 words) - 09:35, 8 April 2025
Hence, the problem is known to need more than exponential run time. Even more difficult are the undecidable problems, such as the halting problem. They cannot...
63 KB (7,784 words) - 06:53, 25 April 2025
are so-called undecidable problems, such as the halting problem for Turing machines. Some well-known difficult abstract problems that have been solved relatively...
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computably enumerable (cf. picture for a fixed x). This set encodes the halting problem as it describes the input parameters for which each Turing machine...
9 KB (1,318 words) - 20:47, 12 May 2025
Entscheidungsproblem (redirect from Entscheidungs Problem)
method' which decides whether any given Turing machine halts or not (the halting problem). If 'algorithm' is understood as meaning a method that can be represented...
19 KB (2,642 words) - 09:57, 5 May 2025
unsolvable, and Turing's theorem that there is no algorithm to solve the halting problem. The incompleteness theorems apply to formal systems that are of sufficient...
92 KB (12,173 words) - 10:15, 18 May 2025