2 papers
stat.ML2025
Fast and Multiphase Rates for Nearest Neighbor Classifiers
Pengkun Yang, Jingzhao Zhang
We study the scaling of classification error rates with respect to the size of the training dataset. In contrast to classical results where rates are minimax optimal for a problem…
math.ST2025
On the best approximation by finite Gaussian mixtures
Yun Ma, Yihong Wu, Pengkun Yang
We consider the problem of approximating a general Gaussian location mixture by finite mixtures. The minimum order of finite mixtures that achieve a prescribed accuracy (measured b…