A function for which several distinct functional values correspond (as a result of different continuations) to one and the same point (Knopp 1996, p. 94).
Multiple-Valued Function
See also
Branch Cut, Riemann Surface, Single-Valued FunctionExplore with Wolfram|Alpha
References
Knopp, K. "Multiple-Valued Functions." Section II in Theory of Functions Parts I and II, Two Volumes Bound as One, Part II. New York: Dover, pp. 93-146, 1996.Referenced on Wolfram|Alpha
Multiple-Valued FunctionCite this as:
Weisstein, Eric W. "Multiple-Valued Function." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Multiple-ValuedFunction.html