Nuprl - Pf append functionality wrt list iso 1 1

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At: append functionality wrt list iso 1 1

1. T: Type
2. L1: T List
3. L2: T List
4. eq: {T}
5. eq TT
6. x:T. eq(x,x)
7. x,y:T. eq(x,y) eq(y,x)
8. x,y,z:T. eq(x,y) eq(y,z) eq(x,z)
9. L3: T List
10. L4: T List
11. Discrete{T}
12. L1(~eq)L2
13. L3(~eq)L4

(L1 @ L3)(~eq)(L2 @ L4)

By: OnHyps [13;12;0] (i.UnfoldTopAb i THEN Analyze i)

Generated subgoals:

1 12. L1(eq)L2
13. L2(eq)L1
14. L3(eq)L4
15. L4(eq)L3
(L1 @ L3)(eq)(L2 @ L4)

2 12. L1(eq)L2
13. L2(eq)L1
14. L3(eq)L4
15. L4(eq)L3
(L2 @ L4)(eq)(L1 @ L3)

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(5steps) PrintForm Definitions Lemmas list 3 jlc Sections Support(jlc) Doc