STKAN: Kolmogorov-Arnold Networks for Spatio-Temporal Forecasting

• URL: http://arxiv.org/abs/2607.13108v1
• Date: Tue, 14 Jul 2026 10:18:54 GMT
• Title: STKAN: Kolmogorov-Arnold Networks for Spatio-Temporal Forecasting
• Abstract summary: We propose STKAN, a Taylor-nomial forecasting architecture that introduces Kolmogo-Arnold Network modules into spatial and temporal token mixing.<n>Experiments show that STKAN achieves better than evaluated spatial interactions benchmarks on five settings tested.<n>These results suggest that the design of nonlinear function approximators can serve as a useful complement to architectural design in traffic-temporal forecasting.
• Score: 30.14175741484625
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Real-world traffic data exhibit heterogeneous spatial correlations and nonlinear temporal dynamics, posing substantial challenges for accurate spatio-temporal forecasting. Existing approaches have developed increasingly sophisticated graph, attention, and decomposition architectures, while the influence of the underlying nonlinear function approximator has received comparatively less attention. In this work, we propose STKAN, a spatio-temporal forecasting architecture that introduces Taylor-polynomial Kolmogorov--Arnold Network modules into spatial and temporal token mixing. STKAN first constructs high-level spatial representations through a learnable soft node-group assignment mechanism, applies group-wise spatial mixing, and subsequently models temporal dependencies over the compressed sequence. Spatial and temporal self-attention layers are further employed to capture long-range interactions. Experiments on five traffic forecasting benchmarks show that STKAN achieves competitive performance and performs better than the evaluated MLP-based variant in the tested settings. These results suggest that the design of nonlinear function approximators can serve as a useful complement to architectural design in spatio-temporal forecasting.

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