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出典:『Wikipedia』 (2011/06/06 17:09 UTC 版)

英語による解説

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In mathematics, stability theory addresses the stability of solutions of differential equations and of trajectories of dynamical systems under small perturbations of initial conditions. The heat equation, for example, is a stable partial differential equation because small perturbations of initial data lead to small variations in temperature at a later time as a result of the maximum principle. More generally, a theorem is stable if small changes in the hypothesis lead to small variations in the conclusion. One must specify the metric used to measure the perturbations when claiming a theorem is stable. In partial differential equations one may measure the distances between functions using Lp norms or the sup norm, while in differential geometry one may measure the distance between spaces using the Gromov-Hausdorff distance.