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Step * of Lemma vs-subtract_wf

∀[K:RngSig]. ∀[vs:VectorSpace(K)]. ∀[x,y:Point(vs)].  ((x - y) ∈ Point(vs))
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[K:RngSig].  \mforall{}[vs:VectorSpace(K)].  \mforall{}[x,y:Point(vs)].    ((x  -  y)  \mmember{}  Point(vs))


By

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Latex:
ProveWfLemma

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