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Step * of Lemma vs-grp_inverse

∀[K:Rng]. ∀[vs:VectorSpace(K)]. ∀[x:Point(vs)].  ((x + -(x) = 0 ∈ Point(vs)) ∧ (-(x) + x = 0 ∈ Point(vs)))
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Latex:

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Latex:
\mforall{}[K:Rng].  \mforall{}[vs:VectorSpace(K)].  \mforall{}[x:Point(vs)].    ((x  +  -(x)  =  0)  \mwedge{}  (-(x)  +  x  =  0))


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