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https://arxiv.org/abs/2601.09436 [2601.09436] Stationary perturbation theory without sums over intermediate states: Supersymmetric... Abstract page for arXiv paper 2601.09436: Stationary perturbation theory without sums over intermediate states: Supersymmetric Expansion Algorithm perturbation theory 2601 09436 stationary https://arxiv.org/abs/1906.09436 [1906.09436] Fisher and Kernel Fisher Discriminant Analysis: Tutorial Abstract page for arXiv paper 1906.09436: Fisher and Kernel Fisher Discriminant Analysis: Tutorial discriminant analysis 1906 09436 fisher kernel