TeX Quellcode:

\displaystyle B(\xi, \eta) = \int_{-\infty}^{\infty} \int_{-\infty}^{\infty} V(u,v) \cdot \text{e}^{\text{i}\cdot 2\pi \cdot (u \cdot \xi + v \cdot \eta)} \text{d}u ~\text{d}v \text{.}