I would like to ask if the Heaviside Theta function as well as Dirac Delta function are defined in MathCore or MathMore library?
No, these funcitons are not defined, thery are however trivial to implement by the user.
For the Theta function, I assume you mean:
In my opinion, the Dirac function makes sense when you are performing symbolic calculations (like in Mathematica) not so much in numerical computations.
Thanks Lorenzo thats it