A branch point whose neighborhood of values wrap around an infinite number of times as their complex arguments are varied. The point under the function is therefore a logarithmic branch point. Logarithmic branch points are equivalent to logarithmic singularities.
Logarithmic Branch Point
See alsoAlgebraic Branch Point, Branch Point, Logarithmic Singularity
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Cite this as:
Weisstein, Eric W. "Logarithmic Branch Point." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/LogarithmicBranchPoint.html