A parameterized family of weighted Ducci maps
JOURNAL OF DIFFERENCE EQUATIONS AND APPLICATIONS(2010)
摘要
A simple type of unbounded, zero-sum weighting, defined by a single parameter, is applied to the Ducci map on [image omitted]. It is shown how varying this parameter affects the dynamics of the corresponding Ducci sequences, and a connection between the dynamics and the golden ratio is established. These results also establish the existence of unbounded, zero-sum Ducci map weightings for which only the zero-vector is a cycle. Finally, by considering Roth's theorem, it is shown how the algebraic irrational numbers are related to the Ducci problem on [image omitted].
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关键词
Ducci sequences,real-valued weightings,golden ratio,asymptotic behaviour,algebraic irrational numbers
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