Birkhoff center and recurrent behavior of differentially positive systems on a homogeneous space

arXiv:2608.14980 2026 Dynamics 1 ideas extracted · analyzed Sep 1, 2026

What the math gives to ML

The paper develops differential positivity on homogeneous spaces: tangent linearizations preserve a state-dependent homogeneous cone field, inducing an order relation on trajectories. Its main structural result is a Birkhoff-center dichotomy: each connected recurrent component, and the support of every invariant measure, is either strongly ordered or unordered. A transferable neural-network mechanism is to impose and monitor cone preservation in recurrent or state-space architectures, then use the resulting order structure to identify recurrent regimes and prevent hidden-state trajectories from developing uncontrolled transverse directions.

Ideas from this paper

Unverified 2026

Differentially Positive Recurrent Core

Constrain the Jacobian of a recurrent or state-space transition to preserve a prescribed cone of admissible hidden-state perturbations. This imports differential positivity into neural dynamics and makes long-run hidden trajectories order-preserving rather than allowing arbitrary sign-changing perturbation growth.

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Paper: Birkhoff center and recurrent behavior of differentially positive systems on a homogeneous space arXiv:2608.14980