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At: select cons hd

  T:Type, a:Tas:T List, i:i (a.as)[i] = a

By: Unfold `select` 0 THEN UnivCD


Generated subgoal:

1 1. T : Type
2. a : T
3. as : T List
4. i : 
5. i0
  hd(nth_tl(i;a.as)) = a

3 steps

About:
listconsintnatural_numberuniverseequalimpliesall
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(4steps total) PrintForm Definitions list 1 Sections StandardLIB Doc