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Step * of Lemma rat-cube-intersection-idemp

∀[k:ℕ]. ∀[c:ℚCube(k)].  (c ⋂ c = c ∈ ℚCube(k))
BY
{ (Auto THEN Unfold `rational-cube` 0 THEN (FunExt THEN Auto) THEN RepUR ``rat-cube-intersection`` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[k:\mBbbN{}].  \mforall{}[c:\mBbbQ{}Cube(k)].    (c  \mcap{}  c  =  c)


By

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Latex:
(Auto
  THEN  Unfold  `rational-cube`  0
  THEN  (FunExt  THEN  Auto)
  THEN  RepUR  ``rat-cube-intersection``  0
  THEN  Auto)

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