Question

What do you mean by delta function to be lorentz invariant?

Answer 1

Answer:

In a relativistic theory of physics, a Lorentz scalar is an expression, formed from items of the theory, which evaluates to a scalar, invariant under any Lorentz transformation. ... While the components of vectors and tensors are in general altered under Lorentz transformations, Lorentz scalars remain unchanged.

Answer 2

Step-by-step explanation:

The delta function is a generalized function that can be defined as the limit of a class of delta sequences. ... The action of on , commonly denoted or , then gives the value at 0 of for any function . In engineering contexts, the functional nature of the delta function is often suppressed