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Inflection Point

A point on a curve at which the Sign of the Curvature (i.e., the concavity) changes. The First Derivative Test can sometimes distinguish inflection points from Extrema for Differentiable functions $f(x)$.

See also Curvature, Differentiable, Extremum, First Derivative Test, Stationary Point

© 1996-9 Eric W. Weisstein