broydenroot

Broyden's quasi-Newton root-finding method

This subroutine solves a vector function f(x)=0 with Broyden's quasi-Newton method. Both the good and the bad Broyden's methods are implemented.

Reference:
Broyden, Charles G. "A class of methods for solving nonlinear simultaneous equations.", Math. Comp. 19 (1965), 577-593