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BackThru: Thm* P:(Prop). Thm* (a:, b:{...a}. P(a,b)) Thm* Thm* (a:. (b:{...a}. P(a,b)) (b:{a...}. P(a,b))) (a,b:. P(a,b)) THEN At Type (Guarding (b:<type>. <prop>) Auto) |
1 |
b:{...a}, e,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))) | 2 steps |
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8. b:{...a}, e,g:({a..b}A). 8. f((Iter(f;u) i:{a..b}. e(i)),Iter(f;u) i:{a..b}. g(i)) 8. = 8. (Iter(f;u) i:{a..b}. f(e(i),g(i))) b:{a...}, e,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))) | 11 steps |
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