Rolle's theorem

[ rohlz ]
/ roʊlz /

noun Mathematics.

the theorem that a differentiable function having equal values at the endpoints of an interval has a derivative equal to zero at some point in the interval.

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Origin of Rolle's theorem

1890–95; named after Michel Rolle (died 1719), French mathematician
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020