5 papers · 1 filter
Aperiodic monotiles: from geometry to groups
Thierry Coulbois, Anahà Gajardo, Pierre Guillon +1
In 2023, two striking, nearly simultaneous, mathematical discoveries have excited their respective communities, one by Greenfeld and Tao, the other (the Hat tile) by Smith, Myers,…
The LLLR generalised Langton's ant
Victor Lutfalla
We present a short note on the dynamics of the LLLR generalised Langton's ant. We describe two different asymptotic behaviours for the LLLR ant.
Sideways on the highways
Victor Lutfalla
We present two generalised ants (LLRRRL and LLRLRLL) which admit both highway behaviours and other kinds of emergent behaviours from initially finite configurations. This limits th…
Ants on the highway
Anahà Gajardo, Victor Lutfalla, Michaël Rao
We perform intensive computations of Generalised Langton's Ants, discovering rules with a big number of highways. We depict the structure of some of them, formally proving that the…
Bootstrap percolation on rhombus tilings
S Esnay, V Lutfalla, G Theyssier
2-boostrap percolation on a graph is a diffusion process where a vertex gets infected whenever it has at least 2 infected neighbours, and then stays infected forever. It has been m…