Concept

Model of computation

Résumé
In computer science, and more specifically in computability theory and computational complexity theory, a model of computation is a model which describes how an output of a mathematical function is computed given an input. A model describes how units of computations, memories, and communications are organized. The computational complexity of an algorithm can be measured given a model of computation. Using a model allows studying the performance of algorithms independently of the variations that are specific to particular implementations and specific technology. Models Models of computation can be classified into three categories: sequential models, functional models, and concurrent models. Sequential models Sequential models include:
  • Finite state machines
  • Post machines (Post–Turing machines and tag machines).
  • Pushdown automata
  • Register machines ** Random-access machines
  • Turing machines
  • Decision tree model
Functional models Functional models in
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