As the luminance of the surrounding hexagons was increased, the amplitude and implicit time of the center-modulated hexagon's response decreased.
Scattered light would be expected to reduce the effective contrast of the center hexagon's modulation and 0or to increase the time-averaged mean luminance.
This is the reason why it is modelled as a hexagon instead.
We have found both steady and periodic solutions, involving rolls, squares and hexagons.
Some of the numerical computations demonstrate that hexagons may lose their stability to rolls.
I believe that anyone who thinks that the restricted betterness relation is strongly separable across people should also accept the hexagon condition in such cases.
This is the second rule - a hexagon finding rule.
Finally, between (iii) and (iv), the mixed modes become false hexagons in a transcritical bifurcation at the hexagons.
