Am 17.03.2016 um 15:10 schrieb Bald Eagle:

> I do think that his suggestion of "tracking" the curves and determining the
> intersection from a change of sign will work - but that looks more "practical"
> than mathematical and elegant.   But maybe that's the reality of how it's done.

That's numerical mathematics for you.

The so-called bisection method is a well-accepted approach to solve
equations numerical when an analytical approach is not feasible, and has
been around for centuries.

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