Step * of Lemma point-triangle_wf

g:ProjectivePlane. ∀a,b,c:Point.  (PΔ(a;b;c) ∈ ℙ)
BY
ProveWfLemma }


Latex:


Latex:
\mforall{}g:ProjectivePlane.  \mforall{}a,b,c:Point.    (P\mDelta{}(a;b;c)  \mmember{}  \mBbbP{})


By


Latex:
ProveWfLemma




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