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Step * 2 of Lemma rcos-strictly-decreasing


1. iproper([r0, π])
⊢ ifun(λx.-(rsin(x));[r0, π])
BY
{ ((D 0 THEN Auto) THEN Reduce 0 THEN RWO  "-1" 0 THEN Auto) }

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Latex:

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Latex:

1.  iproper([r0,  \mpi{}])
\mvdash{}  ifun(\mlambda{}x.-(rsin(x));[r0,  \mpi{}])


By

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Latex:
((D  0  THEN  Auto)  THEN  Reduce  0  THEN  RWO    "-1"  0  THEN  Auto)

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