0  \setplotsymbol ({\circle*{0.0}} [Bl]) \plotsymbolspacing00mm \setdots <0mm> \plot 0 0.0  00.0 0.0 / \plot 0 0.0  00.0 0.0 / \plot 0 0.0  00.0 0.0 / \plot 0 0.0  00.0 0.0 / \plot 0 0.0  00.0 0.0 /  \setsolid  \put {{\bf FIG. 0} \ \ A two-dimensional dicrete domain.} at 0 -0