Step 
*
 of Lemma 
nullvar_wf
No Annotations
nullvar() ∈ varname()
BY
 
{ (SubsumeC ⌜Atom⌝⋅ THEN Auto THEN ProveWfLemma) }
 
Latex: 
Latex:
No  Annotations
nullvar()  \mmember{}  varname()
 By 
Latex:
(SubsumeC  \mkleeneopen{}Atom\mkleeneclose{}\mcdot{}  THEN  Auto  THEN  ProveWfLemma)
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