zero_brent, a Fortran77 code which finds a zero 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 information on this web page is distributed under the MIT license.
zero_brent is available in a C version and a C++ version and a Fortran77 version and a Fortran90 version and a MATLAB version and an Octave version and a Python version and an R version.
bisection_rc, a Fortran77 code which seeks a solution to the equation F(X)=0 using bisection within a user-supplied change of sign interval [A,B]. The procedure is written using reverse communication.
nms, a Fortran77 code which includes versions of Brent's zero finder.
slatec, a Fortran77 code which includes the zero finder fzero().
test_zero, a Fortran77 library which defines some test functions for which zeroes can be sought.
zero_itp, a Fortran77 code which finds a zero of a scalar function of a scalar variable, starting from a change of sign interval, using the Interpolate/Truncate/Project (ITP) method, which has faster convergence than the bisection method.
zero_rc, a Fortran77 code which seeks a solution of a scalar nonlinear equation f(x) = 0, using reverse communication (RC), by Richard Brent.
zoomin, a Fortran77 code which includes various zero finder routines.
Original Fortran77 version by Richard Brent; This version by John Burkardt.