I Self Energy?

[Meir Achuz]

TL;DR

This shows thata point charge in classical electromagnetism has no 'self energy'.

This PDF shows that a point charge in classical electromagnetism has no 'self energy'.

 

[renormalize]

This PDF shows that a point charge in classical electromagnetism has no 'self energy'.

In your attachment you assert:

This is certainly true for a point "test charge" with infinitesimal $q\,$, which by assumption does not contribute to the potential $\phi$. But can you cite a textbook reference that justifies and agrees with your last two sentences above for a point charge in the case where $q$ is finite?