Def Automata(Alph;States) == (StatesAlphStates)States(States)

Thm* Alph,States:Type{i}. Automata(Alph;States) Type{i'}

Def A(g) == < (s,a. a.s),nil,g >

Thm* Alph:Type, L:LangOver(Alph), g:((x,y:Alph*//(x L-induced Equiv y))). A(g) Automata(Alph;x,y:Alph*//(x L-induced Equiv y))

Def L-induced Equiv(x,y) == z:A*. L(z @ x) L(z @ y)

Thm* A:Type, L:LangOver(A). L-induced Equiv A*A*Prop

Def LangOver(Alph) == Alph*Prop

Thm* Alph:Type{i}. LangOver(Alph) Type{i'}

Def as @ bs == Case of as; nil bs ; a.as' a.(as' @ bs) (recursive)

Thm* T:Type, as,bs:T*. (as @ bs) T*

Def P Q == (P Q) & (P Q)

Thm* A,B:Prop. (A B) Prop

Def P Q == Q P

Thm* A,B:Prop. (A B) Prop