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Step * of Lemma square-board-subtype

∀[n:ℕ]. ∀[T,S:Type].  square-board(n;T) ⊆r square-board(n;S) supposing T ⊆r S
BY
{ (Auto THEN Unfold `square-board` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[n:\mBbbN{}].  \mforall{}[T,S:Type].    square-board(n;T)  \msubseteq{}r  square-board(n;S)  supposing  T  \msubseteq{}r  S


By

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Latex:
(Auto  THEN  Unfold  `square-board`  0  THEN  Auto)

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