At: mn 23 lem 111 1. Alph: Type 2. R: Alph*Alph*Prop 3. Fin(Alph) 4. EquivRel x,y:Alph*. x R y 5. Fin(x,y:Alph*//(x R y)) 6. x,y,z:Alph*. (x R y) ((z @ x) R (z @ y)) 7. g: (x,y:Alph*//(x R y)) 8. x: x,y:Alph*//(x R y) 9. y: x,y:Alph*//(x R y)
Dec(z:Alph*. g(z@x) g(z@y)) By: RWH
(LemmaC
Thm*a,b:. (a b) a = b)
0 Generated subgoal: