Minimizes a multivariate function using a Quasi-Newton algorithm where the inverse Hessian is updated by BFGS and step size is selected using a bracketing & quadratic interpolation method. See Nocedal & Wright (2006).
You can install the package with the command:
remotes::install_github("r-glennie/fmin")
Vignette for the package is here: https://r-glennie.github.io/fmin/