| 1 | 4. Fin(Alph) 5. Fin(St) 6. EquivRel x,y:Alph*. x LangOf(Auto)-induced Equiv y 7. R: Alph* Alph* Prop 8. EquivRel x,y:Alph*. x R y 9. g: (x,y:Alph*//R(x,y))   10. m:  11. m ~ (x,y:Alph*//R(x,y)) 12. l:Alph*. LangOf(Auto)(l)  g(l) 13. x,y,z:Alph*. R(x,y)  R((z @ x),z @ y) 1 m |
| 2 | 4. Fin(Alph) 5. Fin(St) 6. EquivRel x,y:Alph*. x LangOf(Auto)-induced Equiv y 7. R: Alph* Alph* Prop 8. EquivRel x,y:Alph*. x R y 9. g: (x,y:Alph*//R(x,y))   10. m:  11. m ~ (x,y:Alph*//R(x,y)) 12. l:Alph*. LangOf(Auto)(l)  g(l) 13. x,y,z:Alph*. R(x,y)  R((z @ x),z @ y) g:((x,y:Alph*//(x R y))  ). l:Alph*. LangOf(Auto)(l)  g(l) |
| 3 | 13. ( m: . m ~ (x,y:Alph*//(x LangOf(Auto)-induced Equiv y))) & ( l:Alph*. Dec(LangOf(Auto)(l))) Fin(x,y:Alph*//(x LangOf(Auto)-induced Equiv y)) |