+Analytic Continuation is a technique to extend the domain of an [analytic function](/wiki/Analytic_Function). If two analytic functions agree on a small open set, they must agree everywhere their domains overlap, allowing for a unique extension into a larger region, a fundamental concept in [Complex Analysis](/wiki/Complex_Analysis). This process reveals the full "natural" domain of a function from its local definition.
+## See also
+- [Complex Analysis](/wiki/Complex_Analysis)
+- [Analytic Function](/wiki/Analytic_Function)
+- [Riemann Surface](/wiki/Riemann_Surface)
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