  We have considered the dynamical evolution of cellular patterns controlled by
a stochastic Glauber process determined by the deviations of local cell
topology from that of a crystalline structure. Above a critical temperature
evolution is towards a common equilibrium state from any initial configuration,
but beneath this temperature there is a dynamical phase transition, with a
start from a quasi-random state leading to non-equilibrium glassy freezing
whereas an ordered start rests almost unchanged. A temporal persistence
function decays exponentially in the high temperature equilibrating state but
has a characteristic slow non-equilibrium aging-like behaviour in the low
temperature glassy phase.
