They are again disposed on an irregular hexagonal lattice but the number of plumes is different and there is no reflection symmetry.
This paper improves the upper bound for the hexagonal lattice site percolation critical probability.
For the black-white recordings, the stimulus consisted of 61 hexagonal elements.
Three cases are considered, in which the meshes of the network are square, hexagonal or triangular.
Owing to the symmetry of the hexagonal substitution region, there is a substantial reduction in the number of different partition probability functions.
As a rough guide to the size of a calculation, we count the number of hexagonal tiles in the substitution region.
The overwhelming majority of such molecules contain only hexagonal carbon rings.
In this case a perfect hexagonal pattern, which is stable under symmetric perturbations, is perturbed asymmetrically.
