Rolle'stheorem

Rolle'stheorem
Rolle's theorem (rôlz, rōlz) n.
A theorem stating that if a curve is continuous, has two x-intercepts, and has a tangent at every point between the intercepts, at least one of these tangents is parallel to the x-axis.
  [After MichelRolle (1652-1719), French mathematician.]

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Universalium. 2010.

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