zero, a FORTRAN90 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 computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
zero 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.
bisection_integer, a FORTRAN90 code which seeks an integer solution to the equation F(X)=0, using bisection within a user-supplied change of sign interval [A,B].
bisection_rc, a FORTRAN90 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 FORTRAN90 code which includes versions of Brent's zero finder.
slatec, a FORTRAN90 code which includes the zero finder fzero().
test_zero, a FORTRAN90 code which defines some test functions for which zeroes can be sought.
zero_rc, a FORTRAN90 code which seeks solutions of a scalar nonlinear equation f(x) = 0, or a system of nonlinear equations, using reverse communication.
zoomin, a FORTRAN90 code which includes various zero finder routines.
Original FORTRAN77 version by Richard Brent; FORTRAN90 version by John Burkardt.