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One evening, Elara sketched a standard horizontal x-axis. Frustrated by its limitations, she boldly drew a vertical y-axis straight through the center, declaring it the realm of the imaginary unit

If a complex function was differentiable just once, it was automatically differentiable infinitely many times. Variable Compleja

Taking the logarithm of a negative number was no longer forbidden, though it opened up infinite parallel branches of reality. 🧩 The Magic: Holomorphic Functions One evening, Elara sketched a standard horizontal x-axis