Which Neural Net Architectures Give Rise To Exploding and Vanishing Gradients?
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Abstract (arXiv)
We give a rigorous analysis of the statistical behavior of gradients in a randomly initialized fully connected network N with ReLU activations. Our results show that the empirical variance of the squares of the entries in the input-output Jacobian of N is exponential in a simple architecture-dependent constant beta, given by the sum of the reciprocals of the hidden layer widths. When beta is large, the gradients computed by N at initialization vary wildly. Our approach complements the mean field theory analysis of random networks. From this point of view, we rigorously compute finite width corrections to the statistics of gradients at the edge of chaos.
Key facts. Cited by 94 papers in the map (data through 7 Oct 2026). First posted on arXiv 11 Jan 2018.
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Citing papers per year: 2021: 17; 2022: 11; 2023: 27; 2024: 18; 2025: 14; 2026: 7.
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