One-dimensional (string) formal languages and their learning have been studied in considerable depth. However, the knowledge of two-dimensional (picture) counterpart, which retains similar importance, is lacking. We investigate problem picture by applying methods for one-dimensional languages. formalize transcription process from a input into string propose few adaptations to it. These proposal...

We discuss aspects of generic two-dimensional dilaton gravity theories. The geometry is in general conformal to the anti--de Sitter space (${\mathrm{AdS}}_{2}$) and has IR curvature singularities at zero temperature; this can be regulated by a black hole. on-shell action divergent; we holographic energy-momentum tensor adding appropriate counterterms. For theories obtained dimensional reduction...