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At: Rl iff Rg 1 1

1. A: Type
2. R: A*A*Prop
3. EquivRel x,y:A*. x R y
4. x,y,z:A*. (x R y) ((z @ x) R (z @ y))
5. g: (x,y:A*//(x R y))
6. L: LangOver(A)
7. l:A*. L(l) g(l)
8. x: A*
9. y: A*

(z:A*. L(z @ x) L(z @ y)) (z:A*. g(z @ x) g(z @ y))

By:
Assert (L A*Prop)
THEN
RWO "7" 0


Generated subgoals:

1 L A*Prop
210. L A*Prop
(z:A*. g(z @ x) g(z @ y)) (z:A*. g(z @ x) g(z @ y))


About:
alllistapplyassertmemberfunction
propuniverseimpliesquotientbool