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  "body": "\n## Summary\n\nThe argument of a nonzero complex number $z$ is the angle from the positive real axis to $z$ in the [[complex plane|0CTE7A31XQ]].\nIt is determined up to a multiple of $2\\pi$.\nThe usual choice in $(-\\pi, \\pi]$ is the [[principal value|0SQSQP748R]].\n",
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