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Step * of Lemma lower-rc-face_wf

∀[k:ℕ]. ∀[c:ℚCube(k)]. ∀[j:ℕk].  (lower-rc-face(c;j) ∈ ℚCube(k))
BY
{ (Auto THEN RepUR ``rational-cube lower-rc-face`` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[k:\mBbbN{}].  \mforall{}[c:\mBbbQ{}Cube(k)].  \mforall{}[j:\mBbbN{}k].    (lower-rc-face(c;j)  \mmember{}  \mBbbQ{}Cube(k))


By

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Latex:
(Auto  THEN  RepUR  ``rational-cube  lower-rc-face``  0  THEN  Auto)

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