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Step * of Lemma int-decr-map-inDom-prop

∀[Value:Type]. ∀[k:ℤ]. ∀[m:int-decr-map-type(Value)].  (↑int-decr-map-inDom(k;m) ⇐⇒ ↑isl(int-decr-map-find(k;m)))
BY
{ ((UnivCD THENA Auto) THEN Unfold `int-decr-map-inDom` 0 THEN Auto) }

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Latex:


\mforall{}[Value:Type].  \mforall{}[k:\mBbbZ{}].  \mforall{}[m:int-decr-map-type(Value)].
    (\muparrow{}int-decr-map-inDom(k;m)  \mLeftarrow{}{}\mRightarrow{}  \muparrow{}isl(int-decr-map-find(k;m)))


By

((UnivCD  THENA  Auto)  THEN  Unfold  `int-decr-map-inDom`  0  THEN  Auto)

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