Within-sample standardization turns Random Fourier Feature kernels into training-set dependent kernels, and calibrated minimax bounds suggest typical financial samples cannot support genuine high-dimensional learning.
A.3 Proof of Corollary 4.1 Proof of Corollary 4.1
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High-Dimensional Learning in Finance
Within-sample standardization turns Random Fourier Feature kernels into training-set dependent kernels, and calibrated minimax bounds suggest typical financial samples cannot support genuine high-dimensional learning.