digraph example1b { rankdir="LR"; node [texmode="math",shape="circle",style="state"]; q0 [style="state,initial",label="0"]; q1 [style="state,final",label="1"]; q2 [style="state,final",label="2"]; edge [texmode="math",lblstyle="auto"]; q0 -> q0 [label="a",topath="loop above"]; q1 -> q1 [label="a",topath="loop above"]; q0 -> q1 [label="b"]; q1 -> q0 [label="b"]; q1 -> q2 [style="invisible"]; }