backtrack | Backtrack to find a new candidate step size |
bfgs_update | Update inverse Hessian by BFGS method |
check_fmin | Check optimization from data stored during iterations in fmin |
check_stop | Check if stopping criterion satisified |
fmin | Minimize a function f using a Quasi-Newton method |
get_newton_step | Do a Newton update with inverse Hessian |
linesearch | Perform line search in direction of newton step |
zoom | Zoom in on step size given interval where Wolfe conditions... |
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