English

Reversibility of additive CA as function of cylinder size

Dynamical Systems 2014-08-08 v1

Abstract

Additive CA on a cylinder of size nn can be represented by 01-string VV of length nn which is its rule. We study a problem: a class SS of rules given, for any VSV\in S describe all sizes n,n>n,n', n'>n, of cylinders such that extension of VV by zeros to length nn' represents reversible additive CA on a cylinder of size nn'. Since all extensions of VV have the same collection of positions of units, it is convenient to say about classes of collections of positions instead of classes of rules. A criterion of reversibility is proven. The problem is completely solved for infinite class of "block collections", i.e. {(0,1,,h)hZ+}\{(0,1,\dots,h)|h\in\mathbb Z^+\}. Results obtained for "exponential collections" {(1,2,4,,2h)hZ+}\{(1,2,4,\dots,2^h)|h\in\mathbb Z^+\} essentially reduce the complexity of the problem for this class. Ways to transfer the results on other classes of rules/collections are described. A conjecture is formulated for class {(0,1,2m)mZ+}\{(0,1,2^m)|m\in\mathbb Z^+\}.

Keywords

Cite

@article{arxiv.1408.1463,
  title  = {Reversibility of additive CA as function of cylinder size},
  author = {Valeriy Bulitko},
  journal= {arXiv preprint arXiv:1408.1463},
  year   = {2014}
}

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28 pages