Weak forms of shadowing in topological dynamics

Danila Cherkashin, Sergey Kryzhevich

Research output


We consider continuous maps of compact metric spaces. It is proved that every pseudotrajectory with sufficiently small errors contains a subsequence of positive density that is point-wise close to a subsequence of an exact trajectory with the same indices. Also, we study homeomorphisms such that any pseudotrajectory can be shadowed by a finite number of exact orbits. In terms of numerical methods this property (we call it multishadowing) implies possibility to calculate minimal points of the dynamical system. We prove that for the non-wandering case multishadowing is equivalent to density of minimal points. Moreover, it is equivalent to existence of a family of ε-networks (ε > 0) whose iterations are also ε-networks. Relations between multishadowing and some ergodic and topological properties of dynamical systems are discussed.

Original languageEnglish
Pages (from-to)125-150
Number of pages26
JournalTopological Methods in Nonlinear Analysis
Issue number1
Publication statusPublished - 1 Sep 2017

Scopus subject areas

  • Analysis
  • Applied Mathematics

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