Re: [Devel] Problems with bbox code and cubic bezier curves

[Nathan Hurst]

On Tue, 24 Apr 2001, Tom Kacvinsky wrote:

> I hope this is what Richard meant -- find the zeros of the first deriviative,
> because at an inflection point, a curve does not necessarily change 
> monoticity.
> In fact, I *believe* (but have no theorem to cite) that a curve cannot have a
> local max/min at a point of inflection, and vice versa.

A common misconception.  y=x^4 is a trivial counter example.

HTH,
njh