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2. State-space representation - Wikipedia

   en.wikipedia.org/wiki/State-space_representation

   The state space or phase space is the geometric space in which the axes are the state variables. The system state can be represented as a vector , the state vector . If the dynamical system is linear, time-invariant, and finite-dimensional, then the differential and algebraic equations may be written in matrix form.

3. P versus NP problem - Wikipedia

   en.wikipedia.org/wiki/P_versus_NP_problem

   The general class of questions that some algorithm can answer in polynomial time is "P" or "class P". For some questions, there is no known way to find an answer quickly, but if provided with an answer, it can be verified quickly. The class of questions where an answer can be verified in polynomial time is "NP", standing for "nondeterministic ...

4. State space (computer science) - Wikipedia

   en.wikipedia.org/wiki/State_space_(computer_science)

   Vacuum World, a shortest path problem with a finite state space. In computer science, a state space is a discrete space representing the set of all possible configurations of a "system". [1] It is a useful abstraction for reasoning about the behavior of a given system and is widely used in the fields of artificial intelligence and game theory.

5. Multidimensional system - Wikipedia

   en.wikipedia.org/wiki/Multidimensional_system

   A state-space model is a representation of a system in which the effect of all "prior" input values is contained by a state vector. In the case of an m-d system, each dimension has a state vector that contains the effect of prior inputs relative to that dimension. The collection of all such dimensional state vectors at a point constitutes the ...

6. Distributed parameter system - Wikipedia

   en.wikipedia.org/wiki/Distributed_parameter_system

   In control theory, a distributed-parameter system (as opposed to a lumped-parameter system) is a system whose state space is infinite-dimensional. Such systems are therefore also known as infinite-dimensional systems. Typical examples are systems described by partial differential equations or by delay differential equations.

7. Markov chain - Wikipedia

   en.wikipedia.org/wiki/Markov_chain

   For example, imagine a large number n of molecules in solution in state A, each of which can undergo a chemical reaction to state B with a certain average rate. Perhaps the molecule is an enzyme, and the states refer to how it is folded.

8. Nonlinear system - Wikipedia

   en.wikipedia.org/wiki/Nonlinear_system

   In mathematics and science, a nonlinear system (or a non-linear system) is a system in which the change of the output is not proportional to the change of the input. [1] [2] Nonlinear problems are of interest to engineers, biologists, [3] [4] [5] physicists, [6] [7] mathematicians, and many other scientists since most systems are inherently nonlinear in nature. [8]

9. Dynamical systems theory - Wikipedia

   en.wikipedia.org/wiki/Dynamical_systems_theory

   Dynamical systems theory and chaos theory deal with the long-term qualitative behavior of dynamical systems.Here, the focus is not on finding precise solutions to the equations defining the dynamical system (which is often hopeless), but rather to answer questions like "Will the system settle down to a steady state in the long term, and if so, what are the possible steady states?", or "Does ...