interval iterations
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Author(s):  
Jacques Demongeot ◽  
Jules Waku

We present here some theoretical and numerical results about interval iterations. We consider first an application of the interval iterations theory to the problem of entrainment in respiratory physiology for which the classical point iterations theory fails. Then, after a brief review of some of the main aspects of point iterations, we explain what is meant by the term ‘interval iterations’. It consists essentially in replacing in the point iterations the function to iterate by a set-valued map. We present both theoretical and numerical aspects of this new type of iterations and we observe the dynamical behaviours encountered, such as fixed intervals and interval limit cycles. The comparison between point and interval iterations is carried out with respect to a parameter ε , which determines the thickness of a neighbourhood around the function to iterate. We will finally focus our attention on the Verhulst and Ricker functions largely used in population dynamics, which exhibit various asymptotic behaviours.


Computing ◽  
1984 ◽  
Vol 32 (1) ◽  
pp. 13-31 ◽  
Author(s):  
R. Krawczyk
Keyword(s):  

Computing ◽  
1980 ◽  
Vol 24 (2-3) ◽  
pp. 119-129 ◽  
Author(s):  
R. Krawczyk

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