Nuprl - Proof: iter via intseg shift rw 1 2 1

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At: iter via intseg shift rw 1 2 1

1. A : Type
2. f : A

A
3. u : A
4. a :

5. b : {a+1...}
6.

c:{a..b

}, e:({a..c

}

A), k:

.
6. (Iter(f;u) i:{a..c

}. e(i)) = (Iter(f;u) j:{a+k..c+k

}. e(j-k))
7. e : {a..b

}

A
8. k :

f((Iter(f;u) i:{a..b-1

}. e(i)),e(b-1))

f((Iter(f;u) j:{a+k..b+k-1

}. e(j-k)),e(b+k-1-k))

By:

Analyze

Generated subgoal:

1 f(Iter(f;u) i:{a..b-1}. e(i)) = f(Iter(f;u) j:{a+k..b+k-1}. e(j-k))
2 steps

About:

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