# Hoán Chuyển Fourier

${\displaystyle f(t)->F(j\omega )}$ . ${\displaystyle {\mathcal {L}}\{f(t)\}=F(s)=\int \limits _{0^{-}}^{\infty }f(t)e^{-j\omega t}dt}$
 ${\displaystyle f(x)}$ ${\displaystyle {\frac {d}{dt}}}$ ${\displaystyle \int dx}$ ${\displaystyle F(j\omega )=\int f(x)e^{j\omega x}dx}$ ${\displaystyle j\omega }$ ${\displaystyle {\frac {1}{j\omega }}}$