Example 21.12.28.E6289865C7A4 By (21.12.9), we have
\[ \Delta (\omega ,0)=P. \]
In the case of example 21.12.16, we have
\[ \Delta (\omega ,\varphi )=\{ 1\} ,\quad \Delta (\omega ,\psi )=[0,1]. \]
Observe that in the latter case,
\[ \{ G_{\psi }<\infty \} \subsetneq P. \]
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