At: lang auto lem 1 1 2 1 1 1
1. Alph: Type
2. L: LangOver(Alph)
3. EquivRel x,y:Alph*. x L-induced Equiv y
4. L 
Alph*
Prop
5. g: (x,y:Alph*//(x L-induced Equiv y))
6. 
l:Alph*. L(l) 
g(l)
7. l: Alph*
LangOf(A(g))(l) L(l)
By:
Unfold `auto_lang` 0
THEN
Reduce 0
Generated subgoal:
About:
