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At: quotient 1 1 corr 1 1 1 5 1
1. A: Type
2. B: Type
3. f: AB
4. R: BBProp
5. Bij(A; B; f)
6. EquivRel x,y:B. x R y
7. EquivRel x,y:A. x R_f y
8. g: BA
9. InvFuns(A; B; f; g)
10. F: (x,y:A//(x R_f y))(x,y:B//(x R y))
11. F = (x.f(x))
12. G: (x,y:B//(x R y))(x,y:A//(x R_f y))
13. G = g (x,y:B//(x R y))(x,y:A//(x R_f y))

InvFuns(x,y:A//(x R_f y); x,y:B//(x R y); F; G)
By:
Analyze 0
THEN
Ext
THEN
RWW "11 13" 0
THEN
Reduce 0
Generated subgoals:

114. x: x,y:A//(x R_f y)
g(f(x)) = x x,y:A//(x R_f y)
214. x: x,y:B//(x R y)
f(g(x)) = x x,y:B//(x R y)

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