Complex analysis | Calculus

Voorhoeve index

In mathematics, the Voorhoeve index is a non-negative real number associated with certain functions on the complex numbers, named after Marc Voorhoeve. It may be used to extend Rolle's theorem from real functions to complex functions, taking the role that for real functions is played by the number of zeros of the function in an interval. (Wikipedia).

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Neighbourhood (mathematics) | Analytic function | Complex number | Interval (mathematics) | Function (mathematics) | Rolle's theorem | Real number