In-Person Poster presentation / poster accept
On the Saturation Effect of Kernel Ridge Regression
Yicheng Li · Haobo Zhang · Qian Lin
MH1-2-3-4 #141
Keywords: [ Theory ] [ Saturation effect ] [ Kernel ridge regression ] [ Reproducing kernel Hilbert space ] [ learning theory ]
The saturation effect refers to the phenomenon that the kernel ridge regression (KRR) fails to achieve the information theoretical lower bound when the smoothness of the underground truth function exceeds certain level. The saturation effect has been widely observed in practices and a saturation lower bound of KRR has been conjectured for decades. In this paper, we provide a proof of this long-standing conjecture.