I'm attempting to justify existence of the following integral stated in $Proposition \, \, 1$, my approach can be seen withen $Lemma\, \, \, 1.)$ $$ \, \, \, \, \, \, \, Proposition \, \, 1$$ $$1.) \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \oint_{\gamma r}z^{n}dz=\int_{0}^{2 \pi}r^{n}e^{...

I'm attempting to justify existence of the following integral stated in $Proposition \, \, 1$, my approach can be seen withen $Lemma\, \, \, 1.)$ $$ \, \, \, \, \, \, \, Proposition \, \, 1$$ $$1.) \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \oint_{\gamma r}z^{n}dz=\int_{0}^{2 \pi}r^{n}e^{...

I'm attempting to justify existence of the following integral stated in $Proposition \, \, 1$, my approach can be seen withen $Lemma\, \, \, 1.)$ $$ \, \, \, \, \, \, \, Proposition \, \, 1$$ $$1.) \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \oint_{\gamma r}z^{n}dz=\int_{0}^{2 \pi}r^{n}e^{...