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Learning Algorithm Generalization Error Bounds via Auxiliary Distributions

Aminian, Gholamali; Masiha, Saeed; Toni, Laura; Rodrigues, Miguel RD; (2024) Learning Algorithm Generalization Error Bounds via Auxiliary Distributions. IEEE Journal on Selected Areas in Information Theory 10.1109/jsait.2024.3391900. (In press). Green open access

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Abstract

Generalization error bounds are essential for comprehending how well machine learning models work. In this work, we suggest a novel method, i.e., the Auxiliary Distribution Method, that leads to new upper bounds on expected generalization errors that are appropriate for supervised learning scenarios. We show that our general upper bounds can be specialized under some conditions to new bounds involving the α-Jensen-Shannon, α-Rényi (0<α<1) information between a random variable modeling the set of training samples and another random variable modeling the set of hypotheses. Our upper bounds based on α-Jensen-Shannon information are also finite. Additionally, we demonstrate how our auxiliary distribution method can be used to derive the upper bounds on excess risk of some learning algorithms in the supervised learning context and the generalization error under the distribution mismatch scenario in supervised learning algorithms, where the distribution mismatch is modeled as α-Jensen-Shannon or α-Rényi divergence between the distribution of test and training data samples distributions. We also outline the conditions for which our proposed upper bounds might be tighter than other earlier upper bounds.

Type: Article
Title: Learning Algorithm Generalization Error Bounds via Auxiliary Distributions
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/jsait.2024.3391900
Publisher version: http://dx.doi.org/10.1109/jsait.2024.3391900
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
Keywords: Expected Generalization Error Bounds, population risk upper bound, Mutual Information, α-Jensen-Shannon Information, α-Renyi Information, Distribution mismatch
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10191432
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