glomin, an R code which finds a global minimizer of a scalar function of a scalar variable, by Richard Brent.
The method does not require the use of derivatives, and does not assume that the function is differentiable.
The computer code and data files described and made available on this web page are distributed under the MIT license
glomin is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and an Octave version and a Python version and an R version.
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Original FORTRAN77 version by Richard Brent; R version by John Burkardt.