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math.OC2023
An optimally fast objective-function-free minimization algorithm using random subspaces
S. Bellavia, S. Gratton, B. Morini +1
An algorithm for unconstrained non-convex optimization is described, which does not evaluate the objective function and in which minimization is carried out, at each iteration, wit…
math.OC2023
Inexact Gauss-Newton methods with matrix approximation by sampling for nonlinear least-squares and systems
Stefania Bellavia, Greta Malaspina, Benedetta Morini
We develop and analyze stochastic inexact Gauss-Newton methods for nonlinear least-squares problems and for nonlinear systems ofequations. Random models are formed using suitable s…