Spectrum of inner-product kernel matrices in the polynomial regime and multiple descent phenomenon in kernel ridge regression

Theodor Misiakiewicz

We study the spectrum of inner-product kernel matrices, i.e., $n\times n$ matrices with entries $h(⟨{\text{x}}_i,{\text{x}}_j⟩/d)$ where the $( \textbf{x}_i)_{i \l…