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Learning high-dimensional targets by two-parameter models and gradient flow
Feb. 28, 2024, 5:42 a.m. | Dmitry Yarotsky
cs.LG updates on arXiv.org arxiv.org
Abstract: We explore the theoretical possibility of learning $d$-dimensional targets with $W$-parameter models by gradient flow (GF) when $W<d$ there is necessarily a large subset of GF-non-learnable targets. In particular, the set of learnable targets is not dense in $\mathbb R^d$, and any subset of $\mathbb R^d$ homeomorphic to the $W$-dimensional sphere contains non-learnable targets. Finally, we observe that the model in our main theorem on almost guaranteed two-parameter learning is constructed using a hierarchical procedure …
abstract arxiv cs.lg explore flow gradient possibility set stat.ml targets type
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