fact: Definition L2 := Conc (Atom false) (Conc (Star (Atom false)) (Conc (Atom true) (Star (Plus (Atom false) (Atom true))))).
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq fintype) mathcomp(bigop path) RegexpBrzozowski(glue gfinset regexp finite_der equiv) RegexpBrzozowski(sim1 sim2)