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Step * of Lemma decreasing-on-interval_wf

∀[I:Interval]. ∀[f:I ⟶ℝ].  (f[x] decreasing for x ∈ I ∈ ℙ)
BY
{ ProveWfLemma⋅ }

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Latex:

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Latex:
\mforall{}[I:Interval].  \mforall{}[f:I  {}\mrightarrow{}\mBbbR{}].    (f[x]  decreasing  for  x  \mmember{}  I  \mmember{}  \mBbbP{})


By

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Latex:
ProveWfLemma\mcdot{}

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