Thus, the power spectral density function is a set of Dirac delta functions.

This can be interpreted as a Dirac delta function that is created immediately after the pulse.

Note that the Dirac delta function potential attains this limit.

For example, the Dirac delta function is a singular measure.

Point loads can be modeled with help of the Dirac delta function.

The Dirac delta function can model an electromagnetic charge of a point in space.

The Dirac delta function is homogeneous of degree 1.

The superscript 2 indicates that the Dirac delta function is in two dimensions.

For example it is not meaningful to square the Dirac delta function.

The limit of then becomes the Dirac delta function.