Def LangOf(DA)(l) == DA(l)

Thm* Alph,St:Type, A:Automata(Alph;St). LangOf(A) LangOver(Alph)

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

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

Def L = M == l:Alph*. L(l) M(l)

Thm* Alph:Type{i}, L,M:LangOver(Alph). L = M Prop{i'}

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 DA(l) == FinalState(DA)(Result(DA)l)

Thm* Alph,St:Type, A:Automata(Alph;St), l:Alph*. A(l)

Def b == if b True else False fi

Thm* b:. b Prop

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

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

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

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

Def Result(DA)l == if null(l) InitialState(DA) else DA((Result(DA)tl(l)),hd(l)) fi (recursive)

Thm* Alph,St:Type, A:Automata(Alph;St), l:Alph*. (Result(A)l) St

Thm* Alph,States:Type, a:Automata(Alph;States). FinalState(a) States

Def P Q == Q P

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

Def hd(l) == Case of l; nil "?" ; h.t h

Thm* A:Type, l:A*. ||l||1 hd(l) A

Def tl(l) == Case of l; nil nil ; h.t t

Thm* A:Type, l:A*. tl(l) A*

Def a == 1of(a)

Thm* Alph,States:Type, a:Automata(Alph;States). a StatesAlphStates

Thm* Alph,States:Type, a:Automata(Alph;States). InitialState(a) States

Def null(as) == Case of as; nil true ; a.as' false

Thm* T:Type, as:T*. null(as)

Thm* null(nil)

Thm* A:Type, B:(AType), p:a:AB(a). 2of(p) B(1of(p))

Thm* A:Type, B:(AType), p:a:AB(a). 1of(p) A