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Series of Hessian-Vector Products for Tractable Saddle-Free Newton Optimisation of Neural Networks
Feb. 28, 2024, 5:43 a.m. | Elre T. Oldewage, Ross M. Clarke, Jos\'e Miguel Hern\'andez-Lobato
cs.LG updates on arXiv.org arxiv.org
Abstract: Despite their popularity in the field of continuous optimisation, second-order quasi-Newton methods are challenging to apply in machine learning, as the Hessian matrix is intractably large. This computational burden is exacerbated by the need to address non-convexity, for instance by modifying the Hessian's eigenvalues as in Saddle-Free Newton methods. We propose an optimisation algorithm which addresses both of these concerns - to our knowledge, the first efficiently-scalable optimisation algorithm to asymptotically use the exact inverse …
abstract apply arxiv computational continuous cs.lg free instance machine machine learning matrix networks neural networks optimisation products series stat.ml tractable type vector
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