Nech� $f$ m� v $0$ jednoduch� p�l s reziduem $R$,
$\varphi _r (t) = re^{it}$, $t\in [\alpha,\beta]$.
Pak
$$
\lim _{r \to 0 +} \int _{\varphi _r} f(z) dz =
i(\beta - \alpha) R \quad .
$$
Doka�te.
(Volte $f(z)=g(z) + R/z$, kde $g$ je holomorfn� v $0$.)
