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At: member tl 1

1. T : Type
2. as : T List
3. x : T
4. 0<||as||
5. i : 
6. i<||tl(as)||
7. x = tl(as)[i]
  i:i<||as|| & x = as[i]


By: RWO Thm* l:A List. ||l|| ||tl(l)|| = ||l||-1   -2 THEN InstConcl [i+1]
THEN
AllHyps (RWO Thm* as:A List, n:(||as||-1). tl(as)[n] = as[(n+1)])


Generated subgoals:

None

About:
listintnatural_numberaddsubtractless_thanuniverseequalimpliesallexists
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