Nuprl - Proof: before-map 2 2 2

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At: before-map 2 2 2

1. T : Type
2. T' : Type
3. f : T

T'
4. T List
5. u : T
6. v : T List
7.

x',y':T'.
7. x' before y'

map(f;v)

(

x,y:T. x before y

v & f(x) = x' & f(y) = y')
8. x' : T'
9. y' : T'
10. x : T
11. y : T
12. x = u
13. (y

v)
14. f(x) = x'
15. f(y) = y'

(y'

map(f;v))

By:	RWO Thm* a:T List, x:T', f:(TT'). (x map(f;a)) (y:T. (y a) & x = f(y)) 0 THEN InstConcl [y]

Generated subgoals:

None

About:

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