Point-free MV-topologies

We propose a point-free approach to MV-topological spaces in the wake of previous works on both classical and fuzzy topology.

In order to do that, we introduce suitable frame-type structures and a class of fuzzy topological spaces which includes and suitably extends the one of MV-topological spaces.

Then we show an adjoint situation between such structures, and restrict such an adjointness to a duality between the corresponding classes of ``spatial frames'' and ``sober spaces''.

We also use neighbourhood systems to characterize sobriety in this context.