"Nonconvex optimization"@en . "Nonlinear optimization"@en . "Jerad" . "First-order methods"@en . "Sadok" . "f8437eccb60973cb8f8603cd7052a03c" . "Convergence bounds"@en . "Second-order models"@en . "Newton's method nonconvex optimization negative curvature adaptive regularization methods evaluation complexity"@en . "Con- vergence bounds"@en . "Negative curvature"@en . "Objective-function-free optimization OFFO"@en . . "Objective-function-free optimization"@en . "Adagrad"@en . "Noisy gradients"@en . <0000-0002-4892-0514> . "Newton's method"@en . . "Adaptive regularization methods"@en . . "Sadok Jerad" . . . "Evaluation complexity"@en .