4 papers
Simultaneous Inference for Centre-Outward Rankings of Random Objects
Lingfeng Lyu, Doudou Zhou
In many applications one object is chosen to represent a sample and the least typical objects are set aside, usually without any measure of uncertainty. We measure how central an o…
Conditional Evaluation of Language Models with Cheap Auxiliary Signals
Zhi Zhang, Lingfeng Lyu, Yue Kang +1
Aggregate accuracy hides where models succeed and fail. Estimating conditional performance profiles from gold labels alone is expensive, while cheap auxiliary signals such as LLM-j…
Transfer Learning for Moderate-Dimensional Ridge-Regularized Robust Linear Regression
Lingfeng Lyu, Xiao Guo, Zongqi Liu
This paper studies transfer learning for ridge-regularized robust linear regression in the moderate-dimensional regime, where the number of predictors is of the same order as the s…
Preference-based Centrality and Ranking in General Metric Spaces
Lingfeng Lyu, Doudou Zhou
Ranking or assessing centrality in multivariate and non-Euclidean data is difficult because there is no canonical order and many depth notions become computationally fragile in hig…