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Step * of Lemma bm_firsti_wf

∀[T,Key:Type]. ∀[m:binary_map(T;Key)].  (bm_firsti(m) ∈ Key × T?)
BY
{ (Intros
   THEN (InstLemma `binary_map_ind_wf_simple` [⌈T⌉;⌈Key⌉]⋅ THENA Auto)
   THEN Unfold `bm_firsti` 0
   THEN BHyp -1 
   THEN Auto) }

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Latex:


\mforall{}[T,Key:Type].  \mforall{}[m:binary\_map(T;Key)].    (bm\_firsti(m)  \mmember{}  Key  \mtimes{}  T?)


By

(Intros
  THEN  (InstLemma  `binary\_map\_ind\_wf\_simple`  [\mkleeneopen{}T\mkleeneclose{};\mkleeneopen{}Key\mkleeneclose{}]\mcdot{}  THENA  Auto)
  THEN  Unfold  `bm\_firsti`  0
  THEN  BHyp  -1 
  THEN  Auto)

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