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Step * of Lemma prod-discrete

∀A,B:Type.  (discrete-type(A) ⇒ discrete-type(B) ⇒ discrete-type(A × B))
BY
{ (Auto THEN BLemma  `product-discrete` THEN Auto) }

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Latex:

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Latex:
\mforall{}A,B:Type.    (discrete-type(A)  {}\mRightarrow{}  discrete-type(B)  {}\mRightarrow{}  discrete-type(A  \mtimes{}  B))


By

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Latex:
(Auto  THEN  BLemma    `product-discrete`  THEN  Auto)

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