Step
*
of Lemma
message-class-source_wf
∀[Info:Type]. ∀[es:EO+(Info)]. ∀[X:EClass(Info)]. ∀[Y:EClass(Id × Info)].
  (message-class-source(Id × Info; es; X; Y) ∈ ℙ)
BY
{ ProveWfLemma }
Latex:
Latex:
\mforall{}[Info:Type].  \mforall{}[es:EO+(Info)].  \mforall{}[X:EClass(Info)].  \mforall{}[Y:EClass(Id  \mtimes{}  Info)].
    (message-class-source(Id  \mtimes{}  Info;  es;  X;  Y)  \mmember{}  \mBbbP{})
By
Latex:
ProveWfLemma
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