- #1

- 213

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## Main Question or Discussion Point

I just want to make sure that I am understanding the Dirac Delta function properly. Is the following correct?:

For two variables ##x## and ##y##:

\begin{equation}

\begin{split}

\delta(x-y) f(x) &= f(y)

\end{split}

\end{equation}

And:

\begin{equation}

\begin{split}

\delta(x-x) f(x) &= f(x)

\end{split}

\end{equation}

For two variables ##x## and ##y##:

\begin{equation}

\begin{split}

\delta(x-y) f(x) &= f(y)

\end{split}

\end{equation}

And:

\begin{equation}

\begin{split}

\delta(x-x) f(x) &= f(x)

\end{split}

\end{equation}