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Step * of Lemma vs-map-kernel-is-subspace

∀[K:Rng]. ∀[A,B:VectorSpace(K)]. ∀[f:A ⟶ B].  vs-subspace(K;A;a.a ∈ Ker(f))
BY
{ (Auto THEN RepUR ``vs-subspace vs-map-kernel`` 0 THEN Auto THEN DVar `f' THEN Auto THEN RWW "6 5 -1 -2" 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[K:Rng].  \mforall{}[A,B:VectorSpace(K)].  \mforall{}[f:A  {}\mrightarrow{}  B].    vs-subspace(K;A;a.a  \mmember{}  Ker(f))


By

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Latex:
(Auto
  THEN  RepUR  ``vs-subspace  vs-map-kernel``  0
  THEN  Auto
  THEN  DVar  `f'
  THEN  Auto
  THEN  RWW  "6  5  -1  -2"  0
  THEN  Auto)

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