Topology-Preserving Neural Operator Learning via Hodge Decomposition

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Summary

This paper proposes a topology-preserving neural operator learning method using Hodge decomposition to separate topological and geometric components, improving accuracy and efficiency on geometric meshes.

In this paper, we study solution operators of physical field equations on geometric meshes from a function-space perspective. We reveal that Hodge orthogonality fundamentally resolves spectral interference by isolating unlearnable topological degrees of freedom from learnable geometric dynamics, enabling an additive approximation confined to structure-preserving subspaces. Building on Hodge theory and operator splitting, we derive a principled operator-level decomposition. The result is a Hybrid Eulerian-Lagrangian architecture with an algebraic-level inductive bias we call Hodge Spectral Duality (HSD). In our framework, we use discrete differential forms to capture topology-dominated components and an orthogonal auxiliary ambient space to represent complex local dynamics. Our method achieves superior accuracy and efficiency on geometric graphs with enhanced fidelity to physical invariants. Our code is available at https://github.com/ContinuumCoder/Hodge-Spectral-Duality
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Paper page - Topology-Preserving Neural Operator Learning via Hodge Decomposition

Source: https://huggingface.co/papers/2605.13834

Abstract

Physical field equations on geometric meshes are analyzed through Hodge theory to develop a hybrid Eulerian-Lagrangian architecture that improves accuracy and efficiency by separating topological and geometric components.

In this paper, we study solution operators of physical field equations on geometric meshes from a function-space perspective. We reveal thatHodge orthogonalityfundamentally resolvesspectral interferenceby isolating unlearnabletopological degrees of freedomfrom learnablegeometric dynamics, enabling an additive approximation confined to structure-preserving subspaces. Building on Hodge theory and operator splitting, we derive a principledoperator-level decomposition. The result is a Hybrid Eulerian-Lagrangian architecture with an algebraic-level inductive bias we callHodge Spectral Duality(HSD). In our framework, we usediscrete differential formsto capture topology-dominated components and anorthogonal auxiliary ambient spaceto represent complex local dynamics. Our method achieves superior accuracy and efficiency ongeometric graphswith enhanced fidelity tophysical invariants. Our code is available at https://github.com/ContinuumCoder/Hodge-Spectral-Duality

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