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Research

Self-Attentive Sequential Recommendations with Hyperbolic Representations

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Evgeny Frolov (AIRI, Skolkovo Institute of Science and Technology), Tatyana Matveeva (Higher School of Economics, Saint Petersburg State University), Leyla Mirvakhabova (Skolkovo Institute of Science and Technology) and Ivan Oseledets (AIRI, Skolkovo Institute of Science and Technology)

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Abstract

In recent years, self-attentive sequential learning models have surpassed conventional collaborative filtering techniques in next-item recommendation tasks. However, Euclidean geometry utilized in these models may not be optimal for capturing a complex structure of behavioral data. Building on recent advances in the application of hyperbolic geometry to collaborative filtering tasks, we propose a novel approach that leverages hyperbolic geometry in the sequential learning setting. Our approach replaces final output of the Euclidean models with a linear predictor in the non-linear hyperbolic space, which increases the representational capacity and improves recommendation quality.

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