At: mn 23 lem 1 1
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))


Fin((x,y:Alph*//(x R y))
(x,y:Alph*//(x R y)))
By: Inst
Thm*
t:T. Fin(T) 
Fin(T
T)
[x,y:Alph*//(x R y);nil]
Generated subgoal:1 | nil x,y:Alph*//(x R y) |
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