ResearchBenchmarksCovariance matrix estimation on Toeplitz covariance structure ϱ = 0.7, p = 3000Follow1.145Time (s)LBO0.878642.676574.47456.27243Mar 30, 2026Evaluation ResultsMethodMethodLinksTime (s)Frobenius normNuclear normLBO2026.031.1451.8469.119ADMM2026.031.5169.363LADMM2026.031.7492.4598.183FISTA2026.032.0022.5148.26TOSA2026.034.8292.4648.183PFBS2026.037.8042.4538.206