ResearchBenchmarksCovariance matrix estimation on Toeplitz covariance structure ϱ = 0.5, p = 2000Follow1.97Time (s)TOSA1.736243.314124.8926.46988Mar 30, 2026Evaluation ResultsMethodMethodLinksTime (s)Frobenius NormNuclear NormTOSA2026.031.971.4414.693PFBS2026.033.0331.4424.685ADMM2026.033.9465.7732LBO2026.035.8825.9331.875LADMM2026.036.9031.4484.7FISTA2026.037.8141.4414.668