Rolle's theorem

[rohlz]

noun

Mathematics.

1. 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.

Word History and Origins

Origin of Rolle's theorem¹

1890–95; named after Michel Rolle (died 1719), French mathematician

Example Sentences

Maybe it's the influence of Victorina Wasmuth, their peppy, diminutive math teacher, who exudes a boundless enthusiasm as she introduces a lesson on Rolle's theorem and the extreme-value theorem, which, she explains, are key underpinnings of calculus.

From Time Magazine Archive