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Geometric characterizations for strong minima with applications to nuclear norm minimization problems

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arxiv 2308.09224 v1 pith:LSCPYNVC submitted 2023-08-18 math.OC cs.NAmath.NA

classification math.OCcs.NAmath.NA
keywords problemsstrongcharacterizationsminimaminimizationnormnucleargeometric
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In this paper, we introduce several geometric characterizations for strong minima of optimization problems. Applying these results to nuclear norm minimization problems allows us to obtain new necessary and sufficient quantitative conditions for this important property. Our characterizations for strong minima are weaker than the Restricted Injectivity and Nondegenerate Source Condition, which are usually used to identify solution uniqueness of nuclear norm minimization problems. Consequently, we obtain the minimum (tight) bound on the number of measurements for (strong) exact recovery of low-rank matrices.

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  1. Stable Recovery of Regularized Linear Inverse Problems

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    A signal is stably recoverable from noisy linear measurements if and only if the kernel of the measurement operator intersects the tangent cone of the conjugate-subdifferential image only at zero.

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