How to prove that of $\int_{0}^{2\pi}<z,e^{it}>_+dt = \frac{1}{\pi}|z|$ where $x_+:= \left\{\begin{matrix} x, x\geq 0 & \\ 0, x<0 & \end{matrix}\right.$
2026-05-03 15:20:15.1777821615
Integral of a complex dot/inner product
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