Dirac Delta Function)

PS: Dirichlet Delta Function(Dirac
Delta Function)

Also knownUnit Pulse Function. Generally, it is represented by Delta. In terms of concept, it is such a "function": all vertices except zero are equal to zero, and the points in the entire definition domain are equal to 1. Strictly speaking, the Dirichlet delta function cannot be regarded as a function, because a function that meets the preceding conditions does not exist. However, the concept of distribution can be interpretedDirichlet Delta Distribution,Or Delta DistributionBut it is different from the distribution of the Fermi-Dirac. In the theory of Generalized Functions, we can also find the interpretation of Delta functions. At this time, Delta emerged as a very simple generalized function.