For complex-number power series, if complex number lies within a complex-plane circle {convergence circle} {circle of convergence} centered on zero, with no singularities, series converges. If complex number lies outside a complex-plane circle, series diverges.
Mathematical Sciences>Calculus>Series>Convergence>Radius
3-Calculus-Series-Convergence-Radius
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Date Modified: 2022.0224