- #1

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Hello, I have two questions regarding the Radius of convergence.

1. What should we do at the interval (R-eps, R)

2. It used definition to prove radius of convergence, but I am not sure if it is necessary-sufficient condition of convergence. I get that this can be a sufficient condition but not sure of the necessity

1. What should we do at the interval (R-eps, R)

2. It used definition to prove radius of convergence, but I am not sure if it is necessary-sufficient condition of convergence. I get that this can be a sufficient condition but not sure of the necessity