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At: append functionality wrt list iso 1

1. T: Type
2. L1: T List
3. L2: T List
4. eq1: {T}
5. eq1 TT
6. x:T. eq1(x,x)
7. x,y:T. eq1(x,y) eq1(y,x)
8. x,y,z:T. eq1(x,y) eq1(y,z) eq1(x,z)
9. eq2: {T}
10. eq2 TT
11. x:T. eq2(x,x)
12. x,y:T. eq2(x,y) eq2(y,x)
13. x,y,z:T. eq2(x,y) eq2(y,z) eq2(x,z)
14. eq3: {T}
15. eq3 TT
16. x:T. eq3(x,x)
17. x,y:T. eq3(x,y) eq3(y,x)
18. x,y,z:T. eq3(x,y) eq3(y,z) eq3(x,z)
19. L3: T List
20. L4: T List
21. Discrete{T}
22. eq1 = eq2 {T}
23. eq2 = eq3 {T}
24. L1(~eq1)L2
25. L3(~eq2)L4

(L1 @ L3)(~eq3)(L2 @ L4)

By:
HypSubst 22 24 THENA Equivalence -1 THEN HypSubst 23 24 THENA Equivalence -1 THEN HypSubst 23 25 THENA Equivalence -1
THEN
RenameVar `eq' 14
THEN
OnHyps [23;22;13;12;11;10;9;8;7;6;5;4] (i.Thin i)


Generated subgoal:

14. 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)

About:
listboolassertapplyfunctionuniverseequalmemberimpliesall

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