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Extremal solutions and extremal norms of linear differential inclusions of order three

Proceedings of the 45th IEEE Conference on Decision and Control, 2006
Linear differential inclusions arising in the theory of absolute stability of feedback systems with two time-varying sector nonlinearities are considered. It is shown that under controllability/observability assumptions in the case of zero Lyapunov exponent all the extremal solutions tend to the same (up to a positive scaling factor) antiperiodic ...
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Extremal Positive Solutions of Semilinear Schrödinger Equations

Canadian Mathematical Bulletin, 1983
AbstractNecessary and sufficient conditions are proved for the existence of maximal and minimal positive solutions of the semilinear differential equation Δu = -ƒ(x, u) in exterior domains of Euclidean n-space. The hypotheses are that ƒ(x, u) is nonnegative and Hölder continuous in both variables, and bounded above and below by ugi(| x |, u), i = 1, 2,
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Thermodynamics of Extremely Diluted Aqueous Solutions

Annals of the New York Academy of Sciences, 1999
V, Elia, M, Niccoli
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Extreme point solution

2001
Saul I. Gass, Carl M. Harris
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The Use of Colloidal Solutions for Extreme Hemodilution