Triangular function
= Triangular function
{title2=$\operatorname{tri}$}
{wiki}
The triangular function
$$
\operatorname{tri}(x)=(1-|x|)\mathbf1_{[-1,1]}(x)
$$
has angular-frequency Fourier transform $4\sin^2(\xi/2)/\xi^2$.
= Triangular function
{title2=$\operatorname{tri}$}
{wiki}
The triangular function
$$
\operatorname{tri}(x)=(1-|x|)\mathbf1_{[-1,1]}(x)
$$
has angular-frequency Fourier transform $4\sin^2(\xi/2)/\xi^2$.