Step * of Lemma vs-cancel-add

[K:Rng]. ∀[vs:VectorSpace(K)]. ∀[x,y,z:Point(vs)].  (z y ∈ Point(vs) ⇐⇒ y ∈ Point(vs))
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1
1. Rng
2. vs VectorSpace(K)
3. Point(vs)
4. Point(vs)
5. Point(vs)
6. y ∈ Point(vs)
⊢ y ∈ Point(vs)


Latex:


Latex:
\mforall{}[K:Rng].  \mforall{}[vs:VectorSpace(K)].  \mforall{}[x,y,z:Point(vs)].    (z  +  x  =  z  +  y  \mLeftarrow{}{}\mRightarrow{}  x  =  y)


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