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Solve systems with fsolve

Xcas provides six methods (inherited from the GSL) to solve numeric systems of equations of the form f (x) = 0: All methods use an iteration of Newton kind

xn+1 = xn - f'(xn)-1*f (xn)

The four methods hybrid*_solver use also a method of gradient descent when the Newton iteration would make a too large step. The length of the step is computed without scaling for hybrid_solver and hybridj_solver or with scaling (computed from f'(xn)) for hybrids_solver and hybridsj_solver.


giac documentation written by Renée De Graeve and Bernard Parisse