DiscApproxId

In the above pdf, I consider in a unified manner the question of convergence of a power series on the boundary of their radius of convergence, and of Dirichlet series on the boundary of their abscissa of convergence. I end with an application to , where is the nontrivial multiplicative character modulo 4.

This was motivated by these notes of Keith Conrad and a discussion with Kyle Pratt.

*Related*