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arXiv · 2601.21736

A reduced basis method for parabolic PDEs based on a space-time least squares formulation

Michael Hinze·Christian Kahle·Michael Stahl
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Abstract

In this work, we present a POD-greedy reduced basis method for parabolic partial differential equations (PDEs), based on the least squares space-time formulation proposed in [Hinze, Kahle, Stahl, A least-squares space-time approach for parabolic equations, 2023, arXiv:2305.03402] that assumes only minimal regularity. We extend this approach to the parameter-dependent case. The corresponding variational formulation then is based on a parameter-dependent, symmetric, uniformly coercive, and continuous bilinear form. We apply the reduced basis method to this formulation, following the well-developed techniques for parameterized coercive problems, as seen e.g. in reduced basis methods for parameterized elliptic PDEs. We present an offline-online decomposition and provide certification with absolute and relative error bounds. The performance of the method is demonstrated using selected numerical examples.

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Michael Hinze, Christian Kahle, Michael Stahl. 2026-01-29. A reduced basis method for parabolic PDEs based on a space-time least squares formulation. https://arxiv.org/abs/2601.21736

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