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Numerical continuation : ウィキペディア英語版
Numerical continuation

Numerical continuation is a method of computing approximate solutions of a system of parameterized nonlinear equations,
:F(\mathbf u,\lambda) = 0
The ''parameter'' \lambda is usually a real scalar, and the ''solution'' an ''n''-vector. For a fixed ''parameter value'' \lambda, F(\ast,\lambda) maps Euclidean n-space into itself.
Often the original mapping F is from a Banach space into itself, and the Euclidean n-space is a finite-dimensional approximation to the Banach space.
A steady state, or fixed point, of a parameterized family of flows or maps are of this form, and by discretizing trajectories of a flow or iterating a map, periodic orbits and heteroclinic orbits can also be posed as a solution of F=0.
== Other forms ==
In some nonlinear systems, parameters are explicit. In others they are implicit, and the system of nonlinear equations is written
:F(\mathbf u) = 0
where \mathbf u is an ''n''-vector, and its image F(\mathbf u) is an ''n-1'' vector.
This formulation, without an explicit parameter space is not usually suitable for the formulations in the following sections, because they refer to parameterized autonomous nonlinear dynamical systems of the form:
:\mathbf u' = F(\mathbf u,\lambda)
However, in an algebraic system there is no distinction between unknowns \mathbf u and the parameters.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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