(4steps total) PrintForm Definitions list 1 Sections StandardLIB Doc
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At: hd wf 1

1. A : Type
2. l : A List
3. ||l||1
  hd(l A


By: (ListInd 2) THEN (Analyze 0)


Generated subgoals:

1 3. ||nil||1
  hd(nil)  A

1 step
2 3. u : A
4. v : A List
5. ||v|| hd(v A
6. ||u.v||1
  hd((u.v))  A

1 step

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