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Step * of Lemma arcsine_wf

∀[x:{x:ℝ| x ∈ (r(-1), r1)} ]. (arcsine(x) ∈ ℝ)
BY
{ (ProveWfLemma
   THEN InstLemma `rmin-rmax-subinterval` [⌜(r(-1), r1)⌝;⌜r0⌝;⌜x⌝]⋅
   THEN Auto
   THEN BLemma `arcsine_deriv_functionality`
   THEN Auto) }

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Latex:

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Latex:
\mforall{}[x:\{x:\mBbbR{}|  x  \mmember{}  (r(-1),  r1)\}  ].  (arcsine(x)  \mmember{}  \mBbbR{})


By

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Latex:
(ProveWfLemma
  THEN  InstLemma  `rmin-rmax-subinterval`  [\mkleeneopen{}(r(-1),  r1)\mkleeneclose{};\mkleeneopen{}r0\mkleeneclose{};\mkleeneopen{}x\mkleeneclose{}]\mcdot{}
  THEN  Auto
  THEN  BLemma  `arcsine\_deriv\_functionality`
  THEN  Auto)

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