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Ordinary Differential Equations

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Part of the book series: UNITEXT ((UNITEXTMAT,volume 109))

Abstract

Differential equations are as varied as the phenomena of nature described by them.

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Notes

  1. 1.

    At surface level, \(g=9.81\,\mathrm{m/s}^2\).

  2. 2.

    Numerical methods for the solution of differential equations are discussed, for instance, in Griffiths and Higham [GH].

  3. 3.

    With the stipulation \(r/N:=+\infty \) when \(N=0\).

  4. 4.

    For instance, with a norm coming from a Riemannian metric.

  5. 5.

    We will always work in spaces whose topology is metrizable, so we understand

    $$\limsup _{x\rightarrow x_0}f(x)\quad \text{ as }\quad \lim _{\varepsilon \searrow 0} \sup \big \{f(x)\mid x\in U_\varepsilon (x_0)\setminus \{x_0\}\big \}.$$

    In general such a function is lower semicontinuous exactly if its epigraph is closed.

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Correspondence to Andreas Knauf .

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Knauf, A. (2018). Ordinary Differential Equations. In: Mathematical Physics: Classical Mechanics. UNITEXT(), vol 109. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-55774-7_3

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