(22steps total) PrintForm Definitions Lemmas mb event system 1 Sections EventSystems Doc
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At: select concat 1

1. T : Type
2. (T List) List
  n:||concat(nil)||. 
  m:||nil||. 
  ||concat(firstn(m;nil))||n
  n-||concat(firstn(m;nil))||<||nil[m]||
  & concat(nil)[n] = nil[m][(n-||concat(firstn(m;nil))||)]  T


By: Unfold `concat` 0 THEN Reduce 0


Generated subgoals:

None

About:
listnilnatural_numbersubtractless_thanuniverseequalallexists
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(22steps total) PrintForm Definitions Lemmas mb event system 1 Sections EventSystems Doc