Delta function

Delta function may refer to the distribution:

Dirac delta function, $\langle \delta ,\varphi \rangle =\varphi (0)$

or the indexed matrix:

Kronecker delta, $\delta _{ij}=\left\{{\begin{matrix}1,&{\mbox{if }}i=j\\0,&{\mbox{if }}i\neq j\end{matrix}}\right.$

This disambiguation page lists articles associated with the title Delta function.
If an internal link led you here, you may wish to change the link to point directly to the intended article.