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Eigen-unsupported
3.4.1 (git rev 28ded8800c26864e537852658428ab44c8399e87)
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#include <unsupported/Eigen/src/NonLinearOptimization/HybridNonLinearSolver.h>
Finds a zero of a system of n nonlinear functions in n variables by a modification of the Powell hybrid method ("dogleg").
The user must provide a subroutine which calculates the functions. The Jacobian is either provided by the user, or approximated using a forward-difference method.