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Thm* P:(Prop), a:. Thm* (b:{a...}. (c:{a..b}. P(a,c)) P(a,b)) (b:{a...}. P(a,b)) Using:[P(a,b):= Using:[e,g:({a..b}A). Using:[f((Iter(f;u) i:{a..b}. e(i)),Iter(f;u) i:{a..b}. g(i)) Using:[= Using:[(Iter(f;u) i:{a..b}. f(e(i),g(i))) Using:[ A | Using:[a] |
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10. c:{a..b}, e,g:({a..c}A). 10. f((Iter(f;u) i:{a..c}. e(i)),Iter(f;u) i:{a..c}. g(i)) 10. = 10. (Iter(f;u) i:{a..c}. f(e(i),g(i))) 11. e : {a..b}A 12. g : {a..b}A f((Iter(f;u) i:{a..b}. e(i)),Iter(f;u) i:{a..b}. g(i)) = (Iter(f;u) i:{a..b}. f(e(i),g(i))) | 10 steps |
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