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Step * of Lemma stream-subtype

∀[A,B:Type].  stream(A) ⊆r stream(B) supposing A ⊆r B
BY
{ (Auto THEN Unfold `stream` 0 THEN BLemma `corec-subtype-corec2` THEN Auto) }

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Latex:

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Latex:
\mforall{}[A,B:Type].    stream(A)  \msubseteq{}r  stream(B)  supposing  A  \msubseteq{}r  B


By

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Latex:
(Auto  THEN  Unfold  `stream`  0  THEN  BLemma  `corec-subtype-corec2`  THEN  Auto)

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