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Sparse coupling and Markov blankets : a comment on "How particular is the physics of the Free Energy Principle?" by Aguilera, Millidge, Tschantz and Buckley

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2022

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Da Costa, Lancelot

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Physics of Life Reviews. Elsevier. 2022, 42, S. 33-39. ISSN 1571-0645. eISSN 1873-1457. Verfügbar unter: doi: 10.1016/j.plrev.2022.06.001

Zusammenfassung

In this commentary, we respond to a technical analysis of the Free Energy Principle (hereafter: FEP) presented in "How particular is the physics of the Free Energy Principle" by Aguilera et al. In the target article, the authors analyzed certain sparsely coupled stochastic differential equations whose non-equilibrium steady-state densities are claimed--in previous FEP literature--to have a Markov blanket. The authors demonstrate that in general, Markov blankets are not guaranteed to follow from sparse coupling. The current commentary explains the relationship between sparse coupling and Markov blankets in the case of Gaussian steady-state densities. We precisely derive conditions under which causal coupling leads--or does not lead--to Markov blankets. Importantly, our derivations hold for both linear and non-linear stochastic differential equations. This result may shed light on the sorts of systems which we expect to have Markov blankets. Future work should focus on verifying whether these sorts of constraints are satisfied in realistic models of sparsely coupled systems.

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570 Biowissenschaften, Biologie

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ISO 690HEINS, Conor, Lancelot DA COSTA, 2022. Sparse coupling and Markov blankets : a comment on "How particular is the physics of the Free Energy Principle?" by Aguilera, Millidge, Tschantz and Buckley. In: Physics of Life Reviews. Elsevier. 2022, 42, S. 33-39. ISSN 1571-0645. eISSN 1873-1457. Verfügbar unter: doi: 10.1016/j.plrev.2022.06.001
BibTex
@article{Heins2022Spars-58147,
  year={2022},
  doi={10.1016/j.plrev.2022.06.001},
  title={Sparse coupling and Markov blankets : a comment on "How particular is the physics of the Free Energy Principle?" by Aguilera, Millidge, Tschantz and Buckley},
  volume={42},
  issn={1571-0645},
  journal={Physics of Life Reviews},
  pages={33--39},
  author={Heins, Conor and Da Costa, Lancelot}
}
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