Graph evolution by stochastic additions of points and lines

We define the graph G"1 recursively from G"t"-"1 by adding a point or a line with probability @r and q, respectively, if G"t"-"1 is not complete; if G"t"-"1 is complete we always add a point. By using recursions we investigate the probability distribution of the order and size of G"@r of the minimum and maximum orders for a fixed size, and of the minimum and maximum sizes for a fixed order. Expected values and generating functions are determined.