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Exploring chordal sparsity in semidefinite programming with sparse plus low-rank data matrices

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arxiv 2410.23849 v1 pith:CBQLMS2G submitted 2024-10-31 math.OC

classification math.OC
keywords problemssparselow-rankbecausechordalmatricesplusprogramming
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Semidefinite programming (SDP) problems are challenging to solve because of their high dimensionality. However, solving sparse SDP problems with small tree-width are known to be relatively easier because: (1) they can be decomposed into smaller multi-block SDP problems through chordal conversion; (2) they have low-rank optimal solutions. In this paper, we study more general SDP problems whose coefficient matrices have sparse plus low-rank (SPLR) structure. We develop a unified framework to convert such problems into sparse SDP problems with bounded tree-width. Based on this, we derive rank bounds for SDP problems with SPLR structure, which are tight in the worst case.

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  1. Convex relaxation approaches for high-dimensional optimal transport

    math.OC 2025-11 conditional novelty 6.0 of 10

    High-dimensional optimal transport cost can be approximated by semidefinite programs built from sparse local moments, with exponentially decaying error for Gaussian measures with sparse precision.

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