fact: Definition L3 := Conc (Atom true) (Star (Conc (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)