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- W4384132044 abstract "When searching for global optima of nonconvex unconstrained optimization problems, it is desirable that every local minimum be a global minimum. This property of having no spurious local minima is true in various problems of interest nowadays, including principal component analysis, matrix sensing, and linear neural networks. However, since these problems are noncoercive, they may yet have spurious local minima at infinity. The classical tools used to analyze the optimization landscape, namely the gradient and the Hessian, are incapable of detecting spurious local minima at infinity. In this paper, we identify conditions that certify the absence of spurious local minima at infinity, one of which is having bounded subgradient trajectories. We check that they hold in several applications of interest." @default.
- W4384132044 created "2023-07-14" @default.
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- W4384132044 date "2023-07-13" @default.
- W4384132044 modified "2023-09-26" @default.
- W4384132044 title "Certifying the Absence of Spurious Local Minima at Infinity" @default.
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- W4384132044 doi "https://doi.org/10.1137/22m1479531" @default.
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