Inasmuch as stability is a desired property in many circumstances, it is important to have at one’s disposal some effective means of recognizing instability. This is the object of the present chapter. However, before studying instability as such, we shall deal at some length with new concepts such as sectors, expellers, etc., and this deserves some preliminary comments.
KeywordsFunction Versus Auxiliary Function Cluster Point Real Continuous Function Bibliographical Note
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