Strong Wolfe line search (Nocedal & Wright, 2nd ed., Algorithm 3.5).
WHY: For quasi-Newton methods, satisfying the curvature condition improves the chance that the update will maintain a stable approximation (e.g., positive definiteness).
Strong Wolfe line search (Nocedal & Wright, 2nd ed., Algorithm 3.5).
WHY: For quasi-Newton methods, satisfying the curvature condition improves the chance that the update will maintain a stable approximation (e.g., positive definiteness).