CDLinear is a block-circulant layer achieving 1/B parameter reduction whose weight Hessian is DFT-diagonalized, yielding population condition number exactly 1 under input pre-whitening.
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Communication Dynamics Neural Networks: FFT-Diagonalized Layers for Improved Hessian Conditioning at Reduced Parameter Count
CDLinear is a block-circulant layer achieving 1/B parameter reduction whose weight Hessian is DFT-diagonalized, yielding population condition number exactly 1 under input pre-whitening.