If $f: \mathbb{C} \to \mathbb{C}$ is linear, how can we show that $f(x) = a \cdot x$ for some $a \in \mathbb{C}$? Is this even true?
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If $f: \mathbb{C} \to \mathbb{C}$ is linear, how can we show that $f(x) = a \cdot x$ for some $a \in \mathbb{C}$? Is this even true?