At: mn 23 2 1 1 1 1
1. n: {1...}
2. A: Type
3. L: LangOver(A)
4. L 
A*
Prop
5. R: A*A*Prop
6. Fin(A)
7. EquivRel x,y:A*. x R y
8. 
n ~ (x,y:A*//(x R y))
9. 
x,y,z:A*. (x R y) 
((z @ x) R (z @ y))
10. g: (x,y:A*//(x R y))
11. l:A*. L(l) 
g(l)
12. x: x,y:A*//(x R y)
13. y: x,y:A*//(x R y)
f:(n(x,y:A*//(x R y))). Bij(n; x,y:A*//(x R y); f)
By: BackThru
Thm* (f:(AB). Bij(A; B; f)) (A ~ B)
Generated subgoals:None
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