The elegant stone building has an unusual hexagonal chimney.
The hexagonal shaped pencil was developed as an alternative to the round pencil so it would not roll off the desk.
The squares are replaced by intermittent hexagonal patterns when the aspect ratio is increased.
This motion, of course, represents only one-sixth of a complete rotation of the hexagonal wheel.
The most natural way to do so is to take a system made up of two hexagonal planforms, one up and one down.
In contrast, a hexagonal convection does not possess this symmetry.
The flow appears t o be seeking a smaller hexagonal planform but is unable to make the transition.
