Continuation methods are based on piecewise linear approximation of a variety (e.g. curve or surface) by means of numerical solution of an initial value problem [7]. In other words, they compute solution varieties of nonlinear systems usually expressed in terms of an equation
with f:ℝn002B;d → ℝn a real function. The solution of this equation is called zero set (i.e. a particular level set).
As studied in Chapter 1, a zero set is a variety that consists of regular pieces called manifolds, which are joined at singular solutions (which are also solution manifolds, but of a system with lower d). The regular pieces are manifold curves when d = 1, manifold surfaces when d = 2, and d-manifolds in general. These systems arise frequently in engineering and scientific problems, because these problems are often formulated in terms of the computation of a function that satisfies some set of equations, for example, the Navier-Stokes equations, Maxwell's equations, or Newton's law.
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(2009). Continuation Methods. In: Gomes, A.J.P., Voiculescu, I., Jorge, J., Wyvill, B., Galbraith, C. (eds) Implicit Curves and Surfaces: Mathematics, Data Structures and Algorithms. Springer, London. https://doi.org/10.1007/978-1-84882-406-5_6
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