On the multiplier of a repelling fixed point

1994 ◽  
Vol 118 (1) ◽  
pp. 85-108 ◽  
Author(s):  
Lisa R. Goldberg
Filomat ◽  
2018 ◽  
Vol 32 (13) ◽  
pp. 4555-4575 ◽  
Author(s):  
Young Nam

Hyers-Ulam stability of the difference equation with the initial point z0 as follows zi+1 = azi+b/czi+d is investigated for complex numbers a,b,c and d where ad-bc = 1, c ? 0 and a+d ?R\[-2,2]. The stability of the sequence {zn}n?N0 holds if the initial point is in the exterior of a certain disk of which center is ?d/c . Furthermore, the region for stability can be extended to the complement of some neighborhood of the line segment between -d/c and the repelling fixed point of the map z ? az+b/cz+d. This result is the generalization of Hyers-Ulam stability of Pielou logistic equation.


1992 ◽  
Vol 15 (4) ◽  
pp. 819-822 ◽  
Author(s):  
John Gill

It is shown, using classical means, that the outer composition of hyperbolic or loxodromic linear fractional transformations{fn}, wherefn→f, converges toα, the attracting fixed point off, for all complex numbersz, with one possible exception,z0. I.e.,Fn(z):=fn∘fn−1∘…∘f1(z)→αWhenz0exists,Fn(z0)→β, the repelling fixed point off. Applications include the analytic theory of reverse continued fractions.


2006 ◽  
Vol 122 (1) ◽  
pp. 169-193 ◽  
Author(s):  
Ai Hua Fan ◽  
Károly Simon ◽  
Hajnal R. Tóth

2003 ◽  
Author(s):  
Robin R. Vallacher ◽  
Andrzej Nowak ◽  
Matthew Rockloff
Keyword(s):  

2000 ◽  
Vol 39 (02) ◽  
pp. 118-121 ◽  
Author(s):  
S. Akselrod ◽  
S. Eyal

Abstract:A simple nonlinear beat-to-beat model of the human cardiovascular system has been studied. The model, introduced by DeBoer et al. was a simplified linearized version. We present a modified model which allows to investigate the nonlinear dynamics of the cardiovascular system. We found that an increase in the -sympathetic gain, via a Hopf bifurcation, leads to sustained oscillations both in heart rate and blood pressure variables at about 0.1 Hz (Mayer waves). Similar oscillations were observed when increasing the -sympathetic gain or decreasing the vagal gain. Further changes of the gains, even beyond reasonable physiological values, did not reveal another bifurcation. The dynamics observed were thus either fixed point or limit cycle. Introducing respiration into the model showed entrainment between the respiration frequency and the Mayer waves.


2016 ◽  
Vol 2017 (1) ◽  
pp. 17-30 ◽  
Author(s):  
Muhammad Usman Ali ◽  
◽  
Tayyab Kamran ◽  
Mihai Postolache ◽  
◽  
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