TheoremBase

The Complex Exponential Is Holomorphic and Is Its Own Derivative

The complex exponential function is holomorphic on the whole complex plane, and its derivative is the exponential function itself.

Statement

In the setting of Complex Analysis: Standing Notation, let exp⁡:C→C\exp:\mathbb{C}\to\mathbb{C} be the complex exponential function.

The function exp⁡\exp is holomorphic on C\mathbb{C}, and its derivative is exp⁡\exp itself:

exp⁡′(z)=exp⁡z(z∈C).\exp'(z)=\exp z\qquad(z\in\mathbb{C}).

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