Critical Slowing Down in One-Dimensional Maps and Beyond

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This is a brief review on critical slowing down near the Feigenbaum period-doubling bifurcation points and its consequences. The slowing down of numerical convergence leads to an “operational” fractal dimension D=2/3 at a finite order bifurcation point. There is a cross-over to D0=0.538… when the order goes to infinity, i.e., to the Feigenbaum accumulation point. The problem of whether there exists a “super-scaling” for the dimension spectrum DqW that does not depend on the primitive word W underlying the period-n-tupling sequence seems to remain open

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