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At: firstn wf 2 1 1

1. A : Type
2. A List
3. u : A
4. v : A List
5. n:. firstn(n;v A List
6. n : 
7. 0<n
  u.firstn(n-1;v A List


By: Analyze


Generated subgoals:

1   u  A
Auto
2   firstn(n-1;v A List
1 step

About:
listconsintnatural_numbersubtractless_thanuniversememberall
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(9steps total) PrintForm Definitions list 1 Sections StandardLIB Doc