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Published in: Natural Computing 2/2023

25-05-2023

Asynchronous, finite dynamical systems

Author: Henning S. Mortveit

Published in: Natural Computing | Issue 2/2023

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Abstract

Asynchronous, finite dynamical systems are constructed by composing vertex functions \(f_1\)\(f_2\) through \(f_n\) using an order \(\pi\) on \(\{1,2,\ldots ,n\}\) to form maps \(f_\pi\). This article provides a systematic review and new results for comparing the dynamics of maps \(f_\pi\) and \(f_{\pi '}\) formed using different composition orders \(\pi\) and \(\pi '\). Comparisons are done at the level of (i) entire phase spaces (functional equivalence), (ii) the periodic orbits (cycle equivalence), and (iii) topological conjugation (dynamical equivalence). Conditions and criteria are given in terms of the dependency graph G of the vertex functions along with associated structures such as the acyclic orientations of G and the automorphism group of G. For each type of equivalence, graph-theoretic measures are provided that give an upper bound for the number of distinct structures that can be observed up to the respective notion of equivalence. Several connections to existing mathematical theory (e.g., combinatorics and graphs) are presented along with open questions.

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Footnotes
1
git@github.com:HenningMortveit/gds-framework-python.git
 
2
Note that the inversion result is incorrectly stated in (Mortveit and Reidys 2007) where the condition of \(\pi\)-invariance is not included. Strictly speaking, \(\pi\)-invariance is a sufficient condition, and it is not known whether a less restrictive condition may suffice.
 
3
Evaluating \({\bar{\alpha }}(Q_2^3)\) is tedious: any insights from the reader regarding systematic, efficient evaluations would be highly interesting!
 
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Metadata
Title
Asynchronous, finite dynamical systems
Author
Henning S. Mortveit
Publication date
25-05-2023
Publisher
Springer Netherlands
Published in
Natural Computing / Issue 2/2023
Print ISSN: 1567-7818
Electronic ISSN: 1572-9796
DOI
https://doi.org/10.1007/s11047-023-09944-3

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