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At: append commutes under sublist 1 1 1

1. T: Type
2. Discrete{T}
3. eq: {T}
4. eq TT
5. x:T. eq(x,x)
6. x,y:T. eq(x,y) eq(y,x)
7. x,y,z:T. eq(x,y) eq(y,z) eq(x,z)
8. L: T List
9. M: T List
10. EQ: {T=}
11. EQ TT
12. x,y:T. EQ(x,y) x = y

x(L @ M).x(eq) (M @ L)

By: Using [`eq',EQ] (BackThru Thm* eq:{T=}, P:(TProp), L:T List. xL.P(x) (z:T. z(eq) L P(z)))

Generated subgoal:

1 z:T. z(EQ) (L @ M) z(eq) (M @ L)

About:
listboolassertapplyfunctionuniverseequalmemberimpliesall

(9steps) PrintForm Definitions Lemmas list 3 jlc Sections Support(jlc) Doc