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05/15/2022
The domino problem of the hyperbolic plane is undecidable, new proof
The present paper is a new version of the arXiv paper revisiting the pro...
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10/16/2021
What can we learn from universal Turing machines?
In the present paper, we construct what we call a pedagogical universal ...
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08/30/2021
An outer totalistic weakly universal cellular automaton in the dodecagrid with four states
In this paper, we prove that there is an outer totalistic weakly univers...
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07/10/2021
A strongly universal cellular automaton with four states
In this paper, we prove that there is a strongly universal cellular auto...
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04/04/2021
A strongly universal cellular automaton in the dodecagrid with five states
In this paper, we prove that there is a strongly universal cellular auto...
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02/08/2021
A strongly universal cellular automaton on the heptagrid with seven states
In this paper, we prove that there is a strongly universal cellular auto...
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09/04/2019
About Fibonacci trees III: multiple Fibonacci trees
In this third paper, we revisit the question to which extent the propert...
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07/10/2019
About Fibonacci trees. II – generalized Fibonacci trees
In this second paper, we look at the following question: are the propert...
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04/27/2019