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- W4287704993 abstract "Derivative-free - or zeroth-order - optimization (DFO) has gained recent attention for its ability to solve problems in a variety of application areas, including machine learning, particularly involving objectives which are stochastic and/or expensive to compute. In this work, we develop a novel model-based DFO method for solving nonlinear least-squares problems. We improve on state-of-the-art DFO by performing dimensionality reduction in the observational space using sketching methods, avoiding the construction of a full local model. Our approach has a per-iteration computational cost which is linear in problem dimension in a big data regime, and numerical evidence demonstrates that, compared to existing software, it has dramatically improved runtime performance on overdetermined least-squares problems." @default.
- W4287704993 created "2022-07-26" @default.
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- W4287704993 date "2020-07-26" @default.
- W4287704993 modified "2023-10-14" @default.
- W4287704993 title "Scalable Derivative-Free Optimization for Nonlinear Least-Squares Problems" @default.
- W4287704993 doi "https://doi.org/10.48550/arxiv.2007.13243" @default.
- W4287704993 hasPublicationYear "2020" @default.
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