Polynomial-based Self-Attention for Table Representation learning

• URL: http://arxiv.org/abs/2312.07753v2
• Date: Mon, 18 Dec 2023 09:13:55 GMT
• Title: Polynomial-based Self-Attention for Table Representation learning
• Authors: Jayoung Kim, Yehjin Shin, Jeongwhan Choi, Hyowon Wi, Noseong Park
• Abstract summary: Self-attention, a key component of Transformers, can lead to an oversmoothing issue. We propose a novel matrix-based self-attention layer as a substitute for the original self-attention layer. In our experiments with three representative table learning models equipped with our proposed layer, we illustrate that the layer effectively mitigates the oversmoothing problem.
• Score: 23.651207486167518
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Structured data, which constitutes a significant portion of existing data types, has been a long-standing research topic in the field of machine learning. Various representation learning methods for tabular data have been proposed, ranging from encoder-decoder structures to Transformers. Among these, Transformer-based methods have achieved state-of-the-art performance not only in tabular data but also in various other fields, including computer vision and natural language processing. However, recent studies have revealed that self-attention, a key component of Transformers, can lead to an oversmoothing issue. We show that Transformers for tabular data also face this problem, and to address the problem, we propose a novel matrix polynomial-based self-attention layer as a substitute for the original self-attention layer, which enhances model scalability. In our experiments with three representative table learning models equipped with our proposed layer, we illustrate that the layer effectively mitigates the oversmoothing problem and enhances the representation performance of the existing methods, outperforming the state-of-the-art table representation methods.

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