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{\bf Замечание 10.} Функция $F(z) = z^{\alpha}$ имеет множество определения 
$D(F) = \mathbb{C} \setminus \{ 0 \}$.

{\bf Замечание 11.} Символ $(\sqrt[\leftroot{2}n]{z}\,)_{k}$ можно
использовать не только при $k=0,\; 1,\; \dots,\; n-1$, но и при других
целых значениях $k$.

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