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Lecture Notes on Linear Neural Networks: A Tale of Optimization and Generalization in Deep Learning

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arxiv 2408.13767 v2 pith:I2GX4YZA submitted 2024-08-25 cs.LG cs.AIstat.ML

classification cs.LGcs.AIstat.ML
keywords learningdeeptheorygeneralizationoptimizationlecturelinearmathematical
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These notes are based on a lecture delivered by NC on March 2021, as part of an advanced course in Princeton University on the mathematical understanding of deep learning. They present a theory (developed by NC, NR and collaborators) of linear neural networks -- a fundamental model in the study of optimization and generalization in deep learning. Practical applications born from the presented theory are also discussed. The theory is based on mathematical tools that are dynamical in nature. It showcases the potential of such tools to push the envelope of our understanding of optimization and generalization in deep learning. The text assumes familiarity with the basics of statistical learning theory. Exercises (without solutions) are included.

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  1. Gradient Flow Equations for Deep Linear Neural Networks: A Survey from a Network Perspective

    cs.LG 2025-11 conditional novelty 6.0 of 10

    The adjacency-matrix reformulation of deep-linear gradient flow reveals a quotient-space structure of the loss landscape, but the proof that arcs between critical points determine stable and unstable manifolds is incomplete.

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