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At: listp properties
  A:Type, l:A List. ||l||1
By: Unfold `listp` 0

Generated subgoal:

1 1. A : Type
2. l : {l:(A List)| 0<||l|| }
  ||l||1
1 step

About:
natural_numberuniverseall
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

(2steps total) PrintForm Definitions mb list 1 Sections MarkB generic Doc