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A structure-preserving LDG discretization of the Fisher–Kolmogorov equation for modeling neurodegenerative diseases

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  • Antonietti, Paola F.
  • Corti, Mattia
  • Gómez, Sergio
  • Perugia, Ilaria

Abstract

This work presents a structure-preserving, high-order, unconditionally stable numerical method for approximating the solution to the Fisher–Kolmogorov equation on polytopal meshes, with a particular focus on its application in simulating misfolded protein spreading in neurodegenerative diseases. The model problem is reformulated using an entropy variable to guarantee solution positivity, boundedness, and satisfaction of a discrete entropy-stability inequality at the numerical level. The scheme combines a local discontinuous Galerkin method on polytopal meshes for the space discretization with a ν-step backward differentiation formula for the time integration. Implementation details are discussed, including a detailed derivation of the linear systems arising from Newton’s iteration. The accuracy and robustness of the proposed method are demonstrated through extensive numerical tests. Finally, the method’s practical performance is demonstrated through simulations of α-synuclein propagation in a two-dimensional brain geometry segmented from MRI data, providing a relevant computational framework for modeling synucleinopathies (such as Parkinson’s disease) and, more generally, neurodegenerative diseases.

Suggested Citation

  • Antonietti, Paola F. & Corti, Mattia & Gómez, Sergio & Perugia, Ilaria, 2026. "A structure-preserving LDG discretization of the Fisher–Kolmogorov equation for modeling neurodegenerative diseases," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 241(PA), pages 351-366.
    • Handle: RePEc:eee:matcom:v:241:y:2026:i:pa:p:351-366
    DOI: 10.1016/j.matcom.2025.09.006
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    References listed on IDEAS

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    1. Travis B Thompson & Pavanjit Chaggar & Ellen Kuhl & Alain Goriely & for the Alzheimer’s Disease Neuroimaging Initiative, 2020. "Protein-protein interactions in neurodegenerative diseases: A conspiracy theory," PLOS Computational Biology, Public Library of Science, vol. 16(10), pages 1-41, October.
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