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Step * of Lemma cubical-pi-subset

∀[X,phi,A,B,C:Top].  (X, phi.C ⊢ ΠA B ~ X.C ⊢ ΠA B)
BY
{ ((UnivCD THENA Auto) THEN RepUR ``cubical-pi cubical-pi-family context-subset cube-context-adjoin`` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[X,phi,A,B,C:Top].    (X,  phi.C  \mvdash{}  \mPi{}A  B  \msim{}  X.C  \mvdash{}  \mPi{}A  B)


By

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Latex:
((UnivCD  THENA  Auto)
  THEN  RepUR  ``cubical-pi  cubical-pi-family  context-subset  cube-context-adjoin``  0
  THEN  Auto)

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