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stat.ME2026
CP-factorization for high dimensional tensor time series and double projection iterations
Jinyuan Chang, Guanglin Huang, Qiwei Yao +1
We adopt the canonical polyadic (CP) decomposition to model high-dimensional tensor time series. Our primary goal is to identify and estimate the factor loadings in the CP decompos…
cs.LG2026
Hedging Memory Horizons for Non-Stationary Prediction via Online Aggregation
Yutong Wang, Yannig Goude, Qiwei Yao
We study online prediction under distribution shift, where inputs arrive chronologically and outcomes are revealed only after prediction. In this setting, predictors must remain st…