Julia package to find all local extrema of a function in a interval?

[bernhard]

have you considered this

[Ann] IntervalRootFinding.jl for finding all roots of a multivariate function

We are excited to announce v0.2 of the IntervalRootFinding.jl package, which has been completely rewritten from scratch. This package exports a function roots that is guaranteed to find all roots of a given function \mathbb{R}^n \to \mathbb{R}^n in a given box X \subseteq \mathbb{R}^n (or tell you that it is unable to do so). Functions are written with standard Julia syntax; no macros or other magic are required! It is able to do this thanks to the power of interval arithmetic methods, based …