Two new papers published on arXiv address open problems in weighted data selection for linear regression. The first paper resolves a threshold question posed at COLT 2025, proving that $(m+1)d$ weighted examples are exactly sufficient for recovering full-data loss in vector-valued linear regression. The second paper determines exact risk ratios for weighted data selection in linear regression for several cases, including confirming a claim for $F_w(d, 2d-1) = 1 + 1/d$ and providing new values for $F_w(3,4)$ and $F_w(4,5)$. Both papers introduce novel upper-bound techniques and provide structural evidence for their conjectures. AI
IMPACT These papers advance theoretical understanding in machine learning, potentially influencing future algorithm design and data selection strategies.
RANK_REASON Two academic papers published on arXiv addressing specific mathematical problems in machine learning.
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