complexity classes

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• List of complexity classes — This is a list of complexity classes in computational complexity theory. For other computational and complexity subjects, see list of computability and complexity topics.Many of these classes have a Co partner which consists of the complements of …   Wikipedia

• Complexity class — In computational complexity theory, a complexity class is a set of problems of related resource based complexity. A typical complexity class has a definition of the form: the set of problems that can be solved by an abstract machine M using… …   Wikipedia

• Complexity of constraint satisfaction — The complexity of constraint satisfaction is the application of computational complexity theory on constraint satisfaction. It has mainly been studied for discriminating between tractable and intractable classes of constraint satisfaction… …   Wikipedia

• Complexity index — Besides complexity intended as a difficulty to compute a function (see computational complexity), in modern computer science and in statistics another complexity index of a function stands for denoting its information content, in turn affecting… …   Wikipedia

• Classes de complexité P et NP — Théorie de la complexité des algorithmes La théorie de la complexité des algorithmes étudie formellement la difficulté intrinsèque des problèmes algorithmiques. Sommaire 1 Histoire 2 Généralités 2.1 Présentation …   Wikipédia en Français

• Computational complexity theory — is a branch of the theory of computation in theoretical computer science and mathematics that focuses on classifying computational problems according to their inherent difficulty, and relating those classes to each other. In this context, a… …   Wikipedia

• Circuit complexity — In theoretical computer science, circuit complexity is a branch of computational complexity theory in which Boolean functions are classified according to the size or depth of Boolean circuits that compute them. A Boolean circuit with n input bits …   Wikipedia

• Time complexity — In computer science, the time complexity of an algorithm quantifies the amount of time taken by an algorithm to run as a function of the size of the input to the problem. The time complexity of an algorithm is commonly expressed using big O… …   Wikipedia

• P (complexity) — In computational complexity theory, P, also known as PTIME or DTIME(nO(1)), is one of the most fundamental complexity classes. It contains all decision problems which can be solved by a deterministic Turing machine using a polynomial amount of… …   Wikipedia

• NL (complexity) — In computational complexity theory, NL (Nondeterministic Logarithmic space) is the complexity class containing decision problems which can be solved by a nondeterministic Turing machine using a logarithmic amount of memory space. NL is a… …   Wikipedia

• NP (complexity) — Diagram of complexity classes provided that P ≠ NP. The existence of problems outside both P and NP complete in this case was established by Ladner.[1] In computational complexity theory, NP is one of the most fundamental complexity classes. The… …   Wikipedia