Translations:Aliasing/16/en

${\begin{aligned}e^{i\omega {\rm {t}}}{\rm {=}}e^{i{\frac {\pi }{\Delta t}}\Delta tn}{\rm {=}}e^{i\pi n}{\rm {=}}{\left(e^{j\pi }\right)}^{n}{\rm {=}}{\left(-{\rm {l}}\right)}^{n}.\end{aligned}}$

(13)