Interface to the internal C++ optimization routine "optimize"
cppOptimize(f_, min.x, max.x, prec = .Machine$double.eps^0.25)the function
minimum bound on x
maximum bound on x
precision (same default as for the original optimize function)
A list with the following elements:
the minimum abscissa found by the algorithm
the inverse Hessian at par
list of the function evaluation pairs: args and
vals