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Real and imaginary parts of the continuation of  over the  . The imaginary part is a faithful representation of the Riemann surface of  . Imaginary parts of the continuation of  over the  . The two logarithmic branch points at  are clearly visible. The viewpoint is from the lower half‐plane (left graphic) and from the left half‐plane (right graphic). Imaginary parts of the continuation of  over the Riemann sphere. The branch points are at the intersection of the equator with the  ‐plane
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